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Queensland University of Technology
1.
Aldossari, Hussain Mubarak D.
Accommodation effects on peripheral ocular biometry.
Degree: 2016, Queensland University of Technology
URL: http://eprints.qut.edu.au/95486/ 
► The effect of near work on the biometric properties of the eye, including the eye’s length and the thickness of the posterior vascular layer were…
(more)
▼ The effect of near work on the biometric properties of the eye, including the eye’s length and the thickness of the posterior vascular layer were investigated. Short-sighted eyes had greater increases in length and greater thinning of the vascular layer when focused on close objects than did normally-sighted eyes. These changes occurred across the horizontal meridian of the eye and were greatest at the posterior pole. These ocular effects of focusing may partly explain the influence of close work on development of short-sightedness.
Subjects/Keywords: Axial length; Accommodation; Peripheral eye length; Partial coherence interferometry; Choroidal thickness
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APA (6th Edition):
Aldossari, H. M. D. (2016). Accommodation effects on peripheral ocular biometry. (Thesis). Queensland University of Technology. Retrieved from http://eprints.qut.edu.au/95486/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Aldossari, Hussain Mubarak D. “Accommodation effects on peripheral ocular biometry.” 2016. Thesis, Queensland University of Technology. Accessed January 19, 2021.
http://eprints.qut.edu.au/95486/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Aldossari, Hussain Mubarak D. “Accommodation effects on peripheral ocular biometry.” 2016. Web. 19 Jan 2021.
Vancouver:
Aldossari HMD. Accommodation effects on peripheral ocular biometry. [Internet] [Thesis]. Queensland University of Technology; 2016. [cited 2021 Jan 19].
Available from: http://eprints.qut.edu.au/95486/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Aldossari HMD. Accommodation effects on peripheral ocular biometry. [Thesis]. Queensland University of Technology; 2016. Available from: http://eprints.qut.edu.au/95486/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Debert, Iara.
Componentes refrativos da hipermetropia em crianças com ambliopia por esotropia.
Degree: PhD, Oftalmologia, 2012, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-11072012-143443/
;
► Objetivo: Estudar os componentes refrativos da hipermetropia em crianças com ambliopia por esotropia, comparando os olhos amblíopes com os olhos contralaterais. Métodos: Foram incluídos 37…
(more)
▼ Objetivo: Estudar os componentes refrativos da hipermetropia em crianças com ambliopia por esotropia, comparando os olhos amblíopes com os olhos contralaterais. Métodos: Foram incluídos 37 pacientes de 5 a 8 anos de idade, com hipermetropia bilateral e ambliopia por esotropia. Foi realizada avaliação oftalmológica completa, incluindo refratometria sob cicloplegia, ceratometria e biometria ultrassonográfica modo A. Foram registrados profundidade da câmara anterior, espessura do cristalino, profundidade da câmara vítrea e comprimento axial total. O poder refrativo do cristalino foi calculado pelas equações de Bennett. Para comparar erro refrativo, poder da córnea, poder calculado do cristalino e componentes ecobiométricos entre os olhos amblíopes e os olhos contralaterais foi empregado o teste t de Student pareado. Para avaliar a relação entre os principais componentes refrativos individuais e o erro refrativo foram empregados o coeficiente de correlação de Pearson e a análise de regressão linear. Foram construídos também modelos multivariados, incluindo comprimento axial, poder da córnea e poder do cristalino. Resultados: Os olhos amblíopes apresentaram hipermetropia mais alta, menor poder da córnea, maior poder do cristalino, menor profundidade da câmara vítrea e menor comprimento axial. Não houve diferença entre os olhos quanto à profundidade da câmara anterior ou à espessura do cristalino. A variável que apresentou correlação mais forte com o erro refrativo foi a razão comprimento axial/raio de curvatura da córnea (r = -0.92, p < 0.001 nos olhos amblíopes e r = - 0.87, p < 0.001 nos olhos contralaterais). O comprimento axial representou 39,2% da explicação da variabilidade do erro refrativo nos olhos amblíopes e 35,5% nos olhos contralaterais. O modelo que combinou comprimento axial e poder da córnea explicou 85,7% e 79,6% da variabilidade do erro refrativo, respectivamente. Houve correlação significante entre comprimento axial e poder da córnea, indicando diminuição do poder da córnea com o aumento do comprimento axial e os coeficientes de correlação foram semelhantes entre os olhos amblíopes (r = -0.53, p <0.001) e os olhos contralaterais (r = -0.57, p < 0.001). Houve correlação significante entre comprimento axial e poder do cristalino, indicando diminuição do poder do cristalino com o aumento do comprimento axial e os coeficientes de correlação também foram semelhantes entre os olhos amblíopes (r = -0.72, p < 0.001) e os olhos contralaterais (r = -0.69, p < 0.001). Conclusão: As correlações entre os principais componentes refrativos e sua contribuição individual para o erro refrativo foram semelhantes nos olhos amblíopes e nos olhos contralaterais de crianças com esotropia, a despeito da hipermetropia mais alta nos olhos amblíopes
Purpose: To study the refractive components of hyperopia in children with esotropic amblyopia, comparing amblyopic eyes with fellow eyes. Methods: Thirty-seven patients (5 to 8 years old) with bilateral hyperopia and esotropic amblyopia underwent a comprehensive ophthalmic…
Advisors/Committee Members: Alves, Milton Ruiz.
Subjects/Keywords: Ambliopia; Amblyopia; Axial length/eye; Comprimento axial do olho; Esotropia; Esotropia; Hipermetropia; Hyperopia; Ultrasonography; Ultrassonografia
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APA (6th Edition):
Debert, I. (2012). Componentes refrativos da hipermetropia em crianças com ambliopia por esotropia. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/5/5149/tde-11072012-143443/ ;
Chicago Manual of Style (16th Edition):
Debert, Iara. “Componentes refrativos da hipermetropia em crianças com ambliopia por esotropia.” 2012. Doctoral Dissertation, University of São Paulo. Accessed January 19, 2021.
http://www.teses.usp.br/teses/disponiveis/5/5149/tde-11072012-143443/ ;.
MLA Handbook (7th Edition):
Debert, Iara. “Componentes refrativos da hipermetropia em crianças com ambliopia por esotropia.” 2012. Web. 19 Jan 2021.
Vancouver:
Debert I. Componentes refrativos da hipermetropia em crianças com ambliopia por esotropia. [Internet] [Doctoral dissertation]. University of São Paulo; 2012. [cited 2021 Jan 19].
Available from: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-11072012-143443/ ;.
Council of Science Editors:
Debert I. Componentes refrativos da hipermetropia em crianças com ambliopia por esotropia. [Doctoral Dissertation]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/5/5149/tde-11072012-143443/ ;
Queensland University of Technology
3.
Chakraborty, Ranjay.
Diurnal variation of ocular biometrics under natural and defocused conditions.
Degree: 2013, Queensland University of Technology
URL: https://eprints.qut.edu.au/61093/
► It is well known that a broad range of ocular anatomical and physiological parameters undergo significant diurnal variation. However, the natural diurnal variations that occur…
(more)
▼ It is well known that a broad range of ocular anatomical and physiological parameters undergo significant diurnal variation. However, the natural diurnal variations that occur in the length of the human eye (axial length) and their underlying causes have been less well studied. Improvements in optical methods for the measurement of ocular biometrics now allow more precise and comprehensive measurements of axial length to be performed than has previously been possible. Research from animal models also suggests a link between diurnal axial length variations and longer term myopic eye growth, and that retinal image defocus can disrupt these diurnal rhythms in axial length. This research programme has examined the diurnal variations in axial length in young normal eyes, the contributing components and the influence of optical stimuli on these changes.
In the first experiment, the normal pattern and consistency of the diurnal variations in axial length were examined at 10 different times (5 measurements each day, at ~ 3-hour intervals from ~ 9 am to ~ 9 pm) over 2 consecutive days on 30 young adult subjects (15 myopes, 15 emmetropes). Additionally, variations in a range of other ocular biometric measurements such as choroidal thickness, intraocular pressure, and other ocular biometrics were also explored as potential factors that may be associated with the observed variations in axial length. To investigate the potential influence of refractive error on diurnal axial length variations, the differences in the magnitude and pattern of diurnal variations in axial length between the myopic and emmetropic subjects were examined. Axial length underwent significant diurnal variation that was consistently observed over the 2 consecutive days of measurements, with the longest axial length typically occurring during the day, and the shortest at night. Significant diurnal variations were also observed in choroidal thickness, IOP and other ocular biometrics (such as central corneal thickness, anterior chamber depth and vitreous chamber depth) of the eye. Diurnal variations in vitreous chamber depth, IOP (positive associations) and choroidal thickness (negative association) were all significantly correlated with the diurnal changes in axial length. Choroidal thickness was found to fluctuate approximately in antiphase to the axial length changes, with the average timing of the longest axial length coinciding with the thinnest choroid and vice versa. There were no significant differences in the ocular diurnal variations associated with refractive error.
Given that the diurnal changes in axial length could be associated with the changes in the eye’s optical quality, whether the optical quality of the eye also undergoes diurnal variation in the same cohort of young adult myopes and emmetropes over 2 consecutive days was also examined. Significant diurnal variations were observed only in the best sphere refraction (power vector M) and in the spherical aberration of the eye over two consecutive days of testing. The changes in the eyes…
Subjects/Keywords: eye, diurnal variation, axial length, choroidal thickness, defocus, intraocular pressure, myopia; ODTA
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APA (6th Edition):
Chakraborty, R. (2013). Diurnal variation of ocular biometrics under natural and defocused conditions. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/61093/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chakraborty, Ranjay. “Diurnal variation of ocular biometrics under natural and defocused conditions.” 2013. Thesis, Queensland University of Technology. Accessed January 19, 2021.
https://eprints.qut.edu.au/61093/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chakraborty, Ranjay. “Diurnal variation of ocular biometrics under natural and defocused conditions.” 2013. Web. 19 Jan 2021.
Vancouver:
Chakraborty R. Diurnal variation of ocular biometrics under natural and defocused conditions. [Internet] [Thesis]. Queensland University of Technology; 2013. [cited 2021 Jan 19].
Available from: https://eprints.qut.edu.au/61093/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chakraborty R. Diurnal variation of ocular biometrics under natural and defocused conditions. [Thesis]. Queensland University of Technology; 2013. Available from: https://eprints.qut.edu.au/61093/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Melbourne
4.
Jaworski, Alexandra Anne.
A structural and functional profile of high myopia as a function of eye size.
Degree: 2018, University of Melbourne
URL: http://hdl.handle.net/11343/219682
► The prevalence of myopia and its associated sight threatening pathology is anticipated to increase, making high myopia a global health concern, especially in our ageing…
(more)
▼ The prevalence of myopia and its associated sight threatening pathology is anticipated to increase, making high myopia a global health concern, especially in our ageing population. Although pathological sequelae and visual dysfunction have been attributed to excessive elongation in the highly myopic eye, a link between axial elongation and visual dysfunction in the absence of significant pathology is less well described. Furthermore, emmetropia and high myopia are variably defined, and in most instances, defined according to refractive error and not eye size. This thesis was designed to define and distinguish emmetropic and highly myopic eyes with regard to axial length and vitreous chamber depth and to apply these definitions to studies exploring the impact of ocular expansion on visual function and ocular structure.
The first experiment (Chapter 2) used meta-analysis to predict the axial length (23.47 ± 0.07 mm) and vitreous chamber depth (16.12 ± 0.14 mm) of an emmetropic eye. Based on gender matched studies, male eyes not selected for refractive error were found to be larger with respect to both axial length (+0.52 ± 0.04 mm) and vitreous chamber depth (+0.40 ± 0.04 mm) relative to female eyes. Male emmetropic eyes displayed longer vitreous chamber depths (+0.47 ± 0.15 mm) relative to female emmetropic eyes, but axial lengths of emmetropic eyes did not vary with gender. Linear and non-linear meta-regressions predicted minimum dimensions of -5, -6 and -8 Dioptre (D) eyes, with a – 5 D high myope characterised by an axial length and vitreous chamber depth of at least 24.66 and 16.94 mm, respectively. Refractive errors of -5, -6 and -8 D were selected as they have previously been used to define high myopia in other studies, and were the refractive error groupings investigated in Chapters 3 and 4 of this thesis. Systematic review showed that vitreous chamber depth is presented less frequently than axial length in published literature. This may reflect instrumentation used to perform biometry and suggests that vitreous chamber elongation is mostly assumed but not demonstrated by researchers. In such cases, the role of posterior segment elongation in the development of structural and/or functional sequelae is hypothetical.
The second experiment (Chapter 3) contrasted luminance and S-cone pathway spatial processing of axial high myopes ( -8 D) and emmetropes using psychophysical tools. Luminance and S-cone pathways were both probed to discriminate between pathway selective and non-selective visual dysfunction, given the known redundancy of neuronal elements comprising the S-cone pathway and reports of altered colour vision in high myopia. High spatial frequency loss and increased critical area indicated increased separation of neural elements. Critical area enlargement was consistent with a non-uniform posterior pole model of ocular expansion. Models previously reported in the literature have included non-uniform, posterior pole and global expansion. However, unlike the wrok presented here, these…
Subjects/Keywords: High myopia; emmetropia; eye size; refractive error; axial length; vitreous chamber depth; visual function; choroid; retina; OCT
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APA ·
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APA (6th Edition):
Jaworski, A. A. (2018). A structural and functional profile of high myopia as a function of eye size. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/219682
Chicago Manual of Style (16th Edition):
Jaworski, Alexandra Anne. “A structural and functional profile of high myopia as a function of eye size.” 2018. Doctoral Dissertation, University of Melbourne. Accessed January 19, 2021.
http://hdl.handle.net/11343/219682.
MLA Handbook (7th Edition):
Jaworski, Alexandra Anne. “A structural and functional profile of high myopia as a function of eye size.” 2018. Web. 19 Jan 2021.
Vancouver:
Jaworski AA. A structural and functional profile of high myopia as a function of eye size. [Internet] [Doctoral dissertation]. University of Melbourne; 2018. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/11343/219682.
Council of Science Editors:
Jaworski AA. A structural and functional profile of high myopia as a function of eye size. [Doctoral Dissertation]. University of Melbourne; 2018. Available from: http://hdl.handle.net/11343/219682
5.
Squarzoni, Renata.
Biometria ocular e sua relação com sexo, idade, tamanho e peso em cães da raça Cavalier King Charles Spaniel.
Degree: PhD, Clínica Cirúrgica Veterinária, 2011, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/10/10137/tde-18042013-103621/
;
► O crescimento e as dimensões das estruturas oculares em cães de diversas raças têm sido objeto de estudo. Sabe-se que quanto mais longilíneo o crânio,…
(more)
▼ O crescimento e as dimensões das estruturas oculares em cães de diversas raças têm sido objeto de estudo. Sabe-se que quanto mais longilíneo o crânio, maior o comprimento axial do bulbo ocular. O objetivo deste trabalho foi acompanhar o desenvolvimento das dimensões dos componentes oculares (comprimento axial, espessura da lente, profundidade da câmara anterior e da câmara vítrea) e relacionar as medidas com o sexo, a idade, tamanho, medidas do crânio e peso de cães da raça Cavalier King Charles Spaniel, uma raça braquicéfala. Foram realizadas 117 medidas biométricas oculares em cães variando entre 15 dias e 36 meses de idade, não sedados, sentados ou deitados em posição esternal, utilizando-se ultrassonografia modo-B com transdutor microconvexo de 8 MHz. No momento de cada medida ocular os cães foram pesados e as medidas de comprimento, altura, distâncias fronto-occipital, fronto-nasal, bizigomática e circunferência do crânio foram registradas. As estruturas oculares mostraram uma curva de rápido crescimento entre 15 dias e 4 meses de idade e uma curva suave de crescimento até os 12 meses, idade em que cessou o crescimento do cão (altura e comprimento). Os machos apresentaram medidas maiores de altura, comprimento e crânio do que fêmeas, porém não houve diferença significativa entre os parâmetros de biometria ocular de machos e fêmeas. O valor médio de comprimento axial do bulbo para cães adultos (acima de 12 meses) foi de 18,10 ± 0,48 mm, para a espessura da lente, de 7,15 ± 0,16 mm, para profundidade da câmara anterior, de 2,05 ± 0,37 mm e para a profundidade da câmara vítrea, de 8,91 ± 0,30 mm. Não houve diferença entre as medidas dos olhos direito e esquerdo. Os resultados sugerem que a curva de crescimento ocular acompanha a curva de crescimento do cão, fato semelhante ao que ocorre em diferentes espécies estudadas por outros autores. Em cães adultos, não foi observada relação entre as medidas dos componentes oculares e as medidas de altura, comprimento, peso e tamanho do crânio. Foi estabelecida uma tabela de crescimento correlacionando comprimento axial do bulbo e idade do cão com a finalidade de padronizar esses dados para a raça.
Ocular biometry and ocular growth has been studied in dogs of different breeds. It\'s already known that dogs with longer skulls have longer axial length of the eye. This study aimed to evaluate the development of ocular dimensions (axial length of the bulbus, lens thickness, anterior and vitreous chamber depth) in Cavalier King Charles Spaniels, a braquicephalic breed, and its relationship to age, gender, weight, height and lenght of the dog and dimensions of the head. Ocular dimensions were obtained from 117 measurements between 15 days and 3 years old, in standing nonsedated animals using B-mode ultrasound with an 8 MHz curvilinear probe. At the same time the dogs were weighted and height, length and head dimensions (head circumference, fronto-occipital, fronto-nasal distance and bizigomatic distances) were recorded. The ocular parameters showed a rapid growth curve from 15…
Advisors/Committee Members: Barros, Paulo Sergio de Moraes.
Subjects/Keywords: Axial length; Biometria ocular; Cavalier King Charles Spaniel; Cavalier King Charles Spaniel; Comprimento axial; Dimensões oculares; Eye dimensions; Ocular biometry; Ocular ultrasound; Ultrassonografia ocular
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APA (6th Edition):
Squarzoni, R. (2011). Biometria ocular e sua relação com sexo, idade, tamanho e peso em cães da raça Cavalier King Charles Spaniel. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/10/10137/tde-18042013-103621/ ;
Chicago Manual of Style (16th Edition):
Squarzoni, Renata. “Biometria ocular e sua relação com sexo, idade, tamanho e peso em cães da raça Cavalier King Charles Spaniel.” 2011. Doctoral Dissertation, University of São Paulo. Accessed January 19, 2021.
http://www.teses.usp.br/teses/disponiveis/10/10137/tde-18042013-103621/ ;.
MLA Handbook (7th Edition):
Squarzoni, Renata. “Biometria ocular e sua relação com sexo, idade, tamanho e peso em cães da raça Cavalier King Charles Spaniel.” 2011. Web. 19 Jan 2021.
Vancouver:
Squarzoni R. Biometria ocular e sua relação com sexo, idade, tamanho e peso em cães da raça Cavalier King Charles Spaniel. [Internet] [Doctoral dissertation]. University of São Paulo; 2011. [cited 2021 Jan 19].
Available from: http://www.teses.usp.br/teses/disponiveis/10/10137/tde-18042013-103621/ ;.
Council of Science Editors:
Squarzoni R. Biometria ocular e sua relação com sexo, idade, tamanho e peso em cães da raça Cavalier King Charles Spaniel. [Doctoral Dissertation]. University of São Paulo; 2011. Available from: http://www.teses.usp.br/teses/disponiveis/10/10137/tde-18042013-103621/ ;
Erasmus University Rotterdam
6.
Tideman, Willem.
The causes and consequences of childhood myopia.
Degree: 2019, Erasmus University Rotterdam
URL: http://hdl.handle.net/1765/114980
► textabstractMyopia is the eye disorder with the most rapid increase in prevalence worldwide. It develops in childhood with a peak incidence between 13-15 years. Especially…
(more)
▼ textabstractMyopia is the eye disorder with the most rapid increase in prevalence worldwide. It develops in childhood with a peak incidence between 13-15 years. Especially high myopia, a refractive error of -6 diopters or more, increases the risk of permanent visual impairment during adulthood due to structural abnormalities of the retina and optic nerve. The causes of myopia are complex. Lifestyle factors in childhood, such as time spent outdoors and close work are risk factors. Moreover, genetic studies have revealed more than many factors associated with myopia. Pharmacological and optical interventions to inhibit myopia progression are becoming increasingly common. The ultimate goal of this thesis was to gain insight into the causes and consequences of childhood myopia. For this purpose we investigated the environmental and genetic factors of myopia, eye growth in children and ocular biometry development in subjects of the Generation R and ALSPAC study. We studied the consequences of high myopia on visual impairment in adults and found a strong association between axial length and visual impairment.
Subjects/Keywords: Myopia; axial length; ocular biometry; children; eye development; refractive error
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APA (6th Edition):
Tideman, W. (2019). The causes and consequences of childhood myopia. (Doctoral Dissertation). Erasmus University Rotterdam. Retrieved from http://hdl.handle.net/1765/114980
Chicago Manual of Style (16th Edition):
Tideman, Willem. “The causes and consequences of childhood myopia.” 2019. Doctoral Dissertation, Erasmus University Rotterdam. Accessed January 19, 2021.
http://hdl.handle.net/1765/114980.
MLA Handbook (7th Edition):
Tideman, Willem. “The causes and consequences of childhood myopia.” 2019. Web. 19 Jan 2021.
Vancouver:
Tideman W. The causes and consequences of childhood myopia. [Internet] [Doctoral dissertation]. Erasmus University Rotterdam; 2019. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/1765/114980.
Council of Science Editors:
Tideman W. The causes and consequences of childhood myopia. [Doctoral Dissertation]. Erasmus University Rotterdam; 2019. Available from: http://hdl.handle.net/1765/114980
Brno University of Technology
7.
Brož, Petr.
Analýza dat z oftalmologických přístrojů: Data analysis from ophthalmologic devices.
Degree: 2014, Brno University of Technology
URL: http://hdl.handle.net/11012/14507
► In the bechelor theses is a brief overview of anatomy, optic environment and the basic refractive errors of the eye. Listed below are the diagnostic…
(more)
▼ In the bechelor theses is a brief overview of anatomy, optic environment and the basic refractive errors of the
eye. Listed below are the diagnostic techniques that the patient must undergo before cataract surgery (biometry, keratometry of the
eye and subjective measure of visual acuity). The practical part consists of two surveys. In the first research are statistically compared (Wilcoxon paired test, Spearman's correlation coefficient) biometrics methods - acoustic and optical biometry. The second research is evaluated subjective level of uncorrected visual acuity before cataract surgery and after. At the end of this work are discussed and evaluated the results of both studies.
Advisors/Committee Members: Kolář, Radim (advisor), Hemzal, Dušan (referee).
Subjects/Keywords: Oko; biometrie akustická a optická; axiální délka oka; keratometrie; katarakta; refrakce; optická mohutnost nitrooční čočky.; Eye; acoustic and optical biometrics; axial length of the eye; keratometry; cataract; refractive error; refractive power intraocular lens.
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APA (6th Edition):
Brož, P. (2014). Analýza dat z oftalmologických přístrojů: Data analysis from ophthalmologic devices. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/14507
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Brož, Petr. “Analýza dat z oftalmologických přístrojů: Data analysis from ophthalmologic devices.” 2014. Thesis, Brno University of Technology. Accessed January 19, 2021.
http://hdl.handle.net/11012/14507.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Brož, Petr. “Analýza dat z oftalmologických přístrojů: Data analysis from ophthalmologic devices.” 2014. Web. 19 Jan 2021.
Vancouver:
Brož P. Analýza dat z oftalmologických přístrojů: Data analysis from ophthalmologic devices. [Internet] [Thesis]. Brno University of Technology; 2014. [cited 2021 Jan 19].
Available from: http://hdl.handle.net/11012/14507.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Brož P. Analýza dat z oftalmologických přístrojů: Data analysis from ophthalmologic devices. [Thesis]. Brno University of Technology; 2014. Available from: http://hdl.handle.net/11012/14507
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
8.
Noble, Andrew G.
The Repeatability of Peripheral Axial Length
Measurements.
Degree: MS, Vision Science, 2012, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1330654198
► Optical signals of the peripheral retina control eye growth and associated myopia more than previously believed. Traditional thought held that the fovea must play…
(more)
▼ Optical signals of the peripheral retina
control
eye growth and associated myopia more than previously
believed. Traditional thought held that the fovea must play the
largest role in progression of refractive error because of its
integral role in vision. However, recent research shows that the
peripheral retina may be involved. In Rhesus monkeys, peripheral
form deprivation and optically induced hyperopia lead to increased
axial elongation and myopia. Furthermore, emmetropization occurs
when the peripheral cue is removed, even after ablation of the
central retina. Human myopes have relative hyperopic blur in the
periphery, whereas emmetropes and hyperopes exhibit emmetropia or
myopia in the retinal periphery. In fact, relative peripheral
hyperopia precedes myopia onset by two years in children. This
peripheral hyperopic blur may be a signal for myopic
eye growth.
Tracking the 3-dimensional shape of the
eye through peripheral
measurements could provide clues about how peripheral blur
increases
axial elongation. Understanding these optical signals and
pathways could be valuable in ultimately determining how to manage
or prevent myopia. Research has focused on
methods to stymie
eye growth by inducing peripheral myopic defocus.
It is therefore important to determine whether any change in
peripheral
eye length is greater than that which can be expected by
measurement error alone. This study aims to determine the
inter-occasion repeatability of peripheral
axial length
measurements using the IOLMaster in order to learn more about the
growth of peripheral
eye. To assess the
repeatability of the IOLMaster in measuring peripheral
eye length,
we performed five measurements of both non-cycloplegic and
cycloplegic (two drops of 1% tropicamide)
axial length in primary
gaze and at gazes 20 degrees nasal, temporal, superior, and
inferior. The same examiner repeated the measurements one week (± 2
days) later to assess how similar the measurements were from one
week to the next, assuming that no significant
eye growth would
happen in that span of time. A total of 30
subjects completed the study. The 95% limits of agreement (LoA) for
the cycloplegic repeatability at each location were: central
(-0.05, +0.07), nasal (-0.24, +0.23), temporal (-0.14, +0.12),
superior (-0.11, +0.11), and inferior (-0.11, +0.11). The 95% LoA
for the non-cycloplegic repeatability at each location were:
central (-0.07, +0.06), nasal (-0.17, +0.17), temporal (-0.11,
+0.09), superior (-0.27, +0.23), and inferior (-0.15, +0.13). In
general, nasal measurements were the least repeatable of the
peripheral locations. Neither cycloplegic nor non-cycloplegic
measurements consistently provided better repeatability at all
locations. However, cycloplegic measurements provide shorter
eye
lengths than non-cycloplegic measurements (p < 0.001). If
peripheral
eye length is to be measured over time, operators of the
IOLMaster must be consistent in whether or not they use cycloplegic
drops. Users of the IOLMaster can be confident that any change of
0.25 mm…
Advisors/Committee Members: Walline, Jeffrey (Advisor).
Subjects/Keywords: Ophthalmology; Optics; myopia; myopia progression; IOLMaster; repeatability; eye length; axial length of eye; eye shape; eye growth; peripheral retina; peripheral refraction
…Peripheral Retina
As axial length of the eye increases so does myopic refractive error (Lam… …and repeatable tool to
measure peripheral axial length of the eye is crucial to future… …progresses the eye tends to become
longer in axial length while growing to a lesser extent in… …retina. Axial length measurements of the eye are important in research
involving refractive… …error (Wong, Foster et al. 2001). As axial length of the eye increases
so does…
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APA (6th Edition):
Noble, A. G. (2012). The Repeatability of Peripheral Axial Length
Measurements. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1330654198
Chicago Manual of Style (16th Edition):
Noble, Andrew G. “The Repeatability of Peripheral Axial Length
Measurements.” 2012. Masters Thesis, The Ohio State University. Accessed January 19, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1330654198.
MLA Handbook (7th Edition):
Noble, Andrew G. “The Repeatability of Peripheral Axial Length
Measurements.” 2012. Web. 19 Jan 2021.
Vancouver:
Noble AG. The Repeatability of Peripheral Axial Length
Measurements. [Internet] [Masters thesis]. The Ohio State University; 2012. [cited 2021 Jan 19].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1330654198.
Council of Science Editors:
Noble AG. The Repeatability of Peripheral Axial Length
Measurements. [Masters Thesis]. The Ohio State University; 2012. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1330654198
9.
Kuchem, Mallory Kuhlmann.
Ciliary muscle, eye shape, and accommodation in adults with
anisometropia.
Degree: MS, Vision Science, 2012, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1338254685
► Purpose: The purpose of this study was to investigate the relationships between ciliary muscle thickness, refractive error, axial length, and accommodative lag in a…
(more)
▼ Purpose: The purpose of this study was to
investigate the relationships between ciliary muscle thickness,
refractive error,
axial length, and accommodative lag in a sample
of anisometropic adults. Methods: The right and
left eyes of 30 adult subjects were measured. All subjects
possessed a difference of at least one diopter of refractive error
between the two eyes. Accommodative lag to a 4.00 D target was
measured. Then, cycloplegic measurements of the nasal ciliary
muscle thickness (CMT), spherical equivalent refractive error, and
axial length were made. Ciliary muscle thickness measurements were
made at the maximum ciliary muscle thickness (CMTMAX) and at 1.0 mm
(CMT1), 2.0 mm (CMT2), and 3.0 mm (CMT3) posterior to the scleral
spur using the Zeiss Visante¿¿¿¿¿¿¿ Anterior Segment OCT. Simple
linear regression and multilevel regression models were used to
compare ciliary muscle thickness, refractive error,
axial length,
and accommodative lag both across and within
subjects. Results: Across subjects, CMT was
significantly negatively associated with mean refractive error and
significantly positively associated with mean
axial length when
refractive error and
axial length were first averaged between the
two eyes of each
subject. This relationship was most pronounced for
CMT2 (p < 0.0001). When CMT2 was controlled for, CMTMAX and
CMT1, which represent the presumed radial/circular fibers of the
ciliary muscle, are significantly positively associated with mean
refractive error (p < 0.0001) and significantly negatively
associated with mean
axial length (p = 0.0002) across subjects.
Within subjects, there was no significant difference in ciliary
muscle thickness. Accommodative lag was significantly negatively
associated with the thickness of the ciliary muscle, but only at
CMT2 (p = 0.02) and CMT3 (p = 0.01). Within subjects, no difference
in accommodative lag between the two eyes was
observed. Conclusions: Across subjects, this
sample of anisometropic subjects behaves in accordance with the
literature: thicker ciliary muscles are associated with increased
myopic refractive error and
axial length. Within subjects, however,
this relationship ceases to exist, indicating that an
eye can grow
longer and more myopic than its fellow
eye without resulting in an
increase in ciliary muscle thickness. Across subjects, the longer,
more myopic eyes tended to have thicker posterior portions of their
ciliary muscle (posterior to CMT2) and lesser amounts of
accommodative lag, while the shorter, more hyperopic eyes tended to
have thicker anterior portions of their ciliary muscle and larger
amounts of accommodative lag. This suggests a division in both
structure and function at the position of CMT2. Specifically, the
portion of the ciliary muscle posterior to CMT2 may be more
implicated in sustaining accommodation and reducing lag, while the
portion of the ciliary muscle anterior to CMT2 may play a greater
role in accommodative workload.
Advisors/Committee Members: Bailey, Melissa (Advisor).
Subjects/Keywords: Ophthalmology; Optics; Ciliary muscle; eye shape; anisometropia; refractive error; axial length; accommodation
…the retina, often because the axial length of
the eye is “too short”.
In general, refractive… …axial length per subject. For each eye of each subject, the
mean ciliary muscle thickness… …29
Table 3. The relationship between axial length and the presumed circular/radial fibers… …26
Figure 4. Mean ciliary muscle thickness plotted against mean axial length for each… …30
Figure 7. Presumed circular fibers at CMT1 plotted against the mean axial length for…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kuchem, M. K. (2012). Ciliary muscle, eye shape, and accommodation in adults with
anisometropia. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1338254685
Chicago Manual of Style (16th Edition):
Kuchem, Mallory Kuhlmann. “Ciliary muscle, eye shape, and accommodation in adults with
anisometropia.” 2012. Masters Thesis, The Ohio State University. Accessed January 19, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1338254685.
MLA Handbook (7th Edition):
Kuchem, Mallory Kuhlmann. “Ciliary muscle, eye shape, and accommodation in adults with
anisometropia.” 2012. Web. 19 Jan 2021.
Vancouver:
Kuchem MK. Ciliary muscle, eye shape, and accommodation in adults with
anisometropia. [Internet] [Masters thesis]. The Ohio State University; 2012. [cited 2021 Jan 19].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1338254685.
Council of Science Editors:
Kuchem MK. Ciliary muscle, eye shape, and accommodation in adults with
anisometropia. [Masters Thesis]. The Ohio State University; 2012. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1338254685
. 
Open Access Theses and Dissertations
