Browsing Optometry and Vision Science by Type "Master Thesis"
Now showing items 1-20 of 93
-
Adaptation to near addition lenses - Effect of AV/A ratio and age
(University of Waterloo, 2007-05-17)AIM: The primary purpose of this thesis was to evaluate the pattern of changes to accommodation and phoria when pre-presbyopic individuals perform near work for 20 minutes with +2D lenses. In addition, the thesis also ... -
Aspects of Corneal Fluorescein Staining
(University of Waterloo, 2019-04-25)PURPOSE Evaluating the cornea for epithelial fluorescein staining is a key element of the ocular examination of contact lens wearers and people with dry eye disease. It has long been viewed as a method of visualizing a ... -
Aspects of Dynamic Anterior Surface Aberrations
(University of Waterloo, 2014-01-07)Introduction: The measurement of tear film stability/regularity is very critical in the diagnosis of dry eye. The tear breakup time, which is used as a diagnostic tool in diagnosing dry eye, is very subjective in nature ... -
The association between two quality of life measures for first time low vision device users
(University of Waterloo, 2006)Many individuals with impaired vision experience a decreased quality of life. Quality of life is defined as "the degree to which an individual enjoys the important possibilities of their life. " Vision rehabilitation ... -
Automated Cataract Grading using Smartphone Images
(University of Waterloo, 2021-02-02)A cataract is an age-related eye disease and is one of the leading ophthalmological public health problems in developed and developing countries. Early detection of cataracts is necessary to preserve sight and prevent the ... -
Automated Segmentation of Retinal Optical Coherence Tomography Images
(University of Waterloo, 2018-08-21)Aim. Optical Coherence Tomography (OCT) is a fast and non-invasive medical imaging technique which helps in the investigation of each individual retinal layer structure. For early detection of retinal diseases and the study ... -
Calibration and validation the Dynamic Photorefraction System (DPRS)
(University of Waterloo, 2014-09-25)Introduction: Our group has been measuring accommodation in myopic children. The instrument of choice has been the Power Refractor (Multichannel Systems). However, this instrumentation is no longer supported and runs on ... -
Can kynurenic acid cause myelin loss in chicken optic nerves?
(University of Waterloo, 2017-09-27)Kynurenic acid (KYNA) is one of many kynurenine intermediate products in the tryptophan metabolism pathway and has been shown to have neuro-activity. Previous work revealed that prolonged infusion of a high dose of KYNA ... -
Cell death and proliferation characteristics of the retina after optic nerve section in chickens
(University of Waterloo, 2013-09-27)Optic nerve section (ONS) is an experimental model for damage of the optic nerve associated with diseases such as glaucoma and optic neuritis. Damage to the optic nerve causes loss of retinal ganglion cells that are ... -
Central and Peripheral Cornea and Corneal Epithelium Characterized Using Optical Coherence Tomography and Confocal Microscopy
(University of Waterloo, 2008-05-22)Abstract Both in the closed and open eye state the superior limbus is covered by the upper lid. This region is of physiological interest and clinical importance because in chronic hypoxia, neovascularization of the ... -
Central Visual Field Assessment in Late Stage Glaucoma
(University of Waterloo, 2006)Glaucoma is defined as a progressive optic neuropathy, characterized by loss of visual function and often associated with high intra-ocular pressure. Testing the patients' visual function with Standard Automated Perimetry ... -
Changes in corneal thickness in keratoconic eyes with variation in scleral contact lens central clearance
(University of Waterloo, 2021-08-30)Purpose: There has been a resurgence of scleral lens wear, particularly for patients with corneal ectasia, such as keratoconus. This method of lens correction provides good visual acuity for these individuals and is often ... -
Characterization of Lipid Deposition on Contact Lenses
(University of Waterloo, 2017-08-30)The purpose of this thesis was to evaluate the influence of lipid deposition on silicone hydrogel contact lens materials and to construct an in vitro platform to further explore the effect of lipid interaction with contact ... -
Colour discrimination thresholds and acceptability ratings using simulated Microtile displays.
(University of Waterloo, 2011-10-03)Introduction Nearly all flat panel video display monitors have luminance and colour variations as the angle of view varies from the monitor’s perpendicular. The new MicrotileTM displays developed by Christie Digital are ... -
The combined effects of benzalkonium chloride and ultraviolet radiation on the bovine lens in vitro
(University of Waterloo, 2018-04-23)Purpose: To determine the combined effects of benzalkonium chloride (BAK) and ultraviolet radiation (UV) using the primary culture of intact bovine lenses. Methods: Abattoir-provided lenses were dissected from the eyes ... -
Comparative Clinical Performance of Scleral Lenses with Varying Limbal Clearance in a Keratoconic Population
(University of Waterloo, 2019-05-10)PURPOSE The purpose of this study is to investigate the impact varying the limbal clearance (LC) has on the clinical performance of scleral lenses and the levels of inflammatory mediators in the tear film of keratoconic ... -
A Computational Model for Predicting Visual Acuity from Wavefront Aberration Measurements
(University of Waterloo, 2009-09-14)The main purpose of this thesis is to create and validate a visual acuity model with experimentally obtained aberrations of human eyes. The other motivation is to come up with a methodology to objectively predict the ... -
Computerized and Non-Computerized Colour Vision Tests
(University of Waterloo, 2014-08-05)Introduction: Measuring colour discrimination of people who carry out tasks where colour is used to convey information and accurate colour judgments are essential for safe and efficient performance of the task is important ... -
Deep Generative Modeling Based Retinal Image Analysis
(University of Waterloo, 2020-06-16)In the recent past, deep learning algorithms have been widely used in retinal image analysis (fundus and OCT) to perform tasks like segmentation and classification. But to build robust and highly efficient deep learning ... -
Developing algorithms for the analysis of retinal Optical Coherence Tomography images
(University of Waterloo, 2018-09-04)Vision loss, with a prevalence loss greater than 42 million in the United States is one of the major challenges of today's health-care industry and medical science. Early detection of different retinal-related diseases ...