Browsing Optometry and Vision Science by Type "Doctoral Thesis"
Now showing items 21-40 of 73
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Development of an Arabic Continuous Text Near Acuity Chart
(University of Waterloo, 2017-04-24)Purpose: Near visual acuity is an essential measurement during an oculo-visual assessment. Continuous text near visual acuity charts measure reading acuity and other aspects of reading performance. Arabic is ranked as the ... -
Development of Novel Techniques for Measuring Bulbar Conjunctival Red Blood Cell Velocity, Oximetry and Redness
(University of Waterloo, 2009-04-29)Introduction The ocular surface provides a unique opportunity to study hemodynamics since the vessels can be visualized directly, without treatment and non-invasively. The availability of instruments to measure various ... -
Development of Sensitive In Vitro Assays to Assess the Ocular Toxicity Potential of Chemicals and Ophthalmic Products
(University of Waterloo, 2009-04-27)The utilization of in vitro tests with a tiered testing strategy for detection of mild ocular irritants can reduce the use of animals for testing, provide mechanistic data on toxic effects, and reduce the uncertainty ... -
Development of sports-specific classification for Paralympic skiers with visual impairment
(University of Waterloo, 2020-05-28)Introduction: The Paralympic Games are not only a platform for athletes with disabilities to achieve their dreams, but the Games also play a major role in changing societal attitudes towards people with disabilities and ... -
Development of visual acuity and contrast sensitivity in children
(University of Waterloo, 2011-07-11)Purpose: There is little agreement on the age at which visual acuity (VA) and contrast sensitivity (CS) become adult-like. The ultimate purpose of this thesis was to determine whether VA and CS are adult-like at the age ... -
Dose-effect autonomic responses to ocular surface stimulation
(University of Waterloo, 2018-04-26)Introduction: The ocular surface is one of the most densely innervated superficial tissues of the human body supplied extensively by autonomic and sensory nerve fibres. Studies have shown that ocular surface sensory neurons ... -
Effect of aging on measures of visual attention using dual tasks and visual search
(University of Waterloo, 2010-01-19)In Canada, as baby boomers age, there will be an increase in the percentage of seniors within the general population (Statistics Canada, 2006). Seniors often have difficulty in performing certain everyday tasks and have ... -
Effect of vision-based treatments on visual acuity and motor function in children with amblyopia
(University of Waterloo, 2021-08-19)Purpose: To investigate existing as well as novel vision-based treatments in children with amblyopia and determine the utility of motor function as a potential outcome measure. Methods: Three experiments were conducted. ... -
Electrophysiological measures of optic nerve function
(University of Waterloo, 2021-08-26)The contribution of retinal ganglion cells (RGCs) to human electroretinograms (ERGs) is known, but that of chicken (Gallus gallus domesticus) is not clear. This project seeks to determine the effect of RGC dysfunction on ... -
The evaluation of bulbar redness grading scales
(University of Waterloo, 2010-01-12)The use of grading scales is common in clinical practice and research settings. A number of grading scales are available to the practitioner, however, despite their frequent use, they are only poorly understood and may be ... -
Examination of Contact Lenses and Dry Eye Using Evaporimetry
(University of Waterloo, 2022-01-14)Purpose: Evaporimetry is a non-invasive technique used to assess the stability of the tear film. The test measures the rate of tear evaporation, and has been used to investigate dry eye, contact lenses, and the efficacy ... -
Fabrication of an enzyme responsive biomaterial for the treatment of recurrent corneal erosion
(University of Waterloo, 2023-04-11)Purpose: Recurrent corneal erosion (RCE) arising from the loss of superficial corneal epithelial cells causes tremendous ocular pain affecting one’s productivity and quality of life. RCE was traditionally treated with eye ... -
Fish (Oreochromis niloticus) as a Model of Refractive Error Development
(University of Waterloo, 2009-01-13)Myopia is a common ocular condition worldwide and the mechanism of myopia is still not clear. A number of animal models of myopia and refractive error development have been proposed. The fact that form deprivation myopia ... -
Fundamentals of Protein Adsorption at the Solid-Liquid Interface over Short Time Periods
(University of Waterloo, 2014-12-16)Purpose: To directly measure the quantity and degree of denaturation of biomaterial- adsorbed proteins over short time periods. Methods: Contact lenses were used as model biomaterials as they are widely used, readily ... -
Image Restoration Methods for Retinal Images: Denoising and Interpolation
(University of Waterloo, 2015-04-27)Retinal imaging provides an opportunity to detect pathological and natural age-related physiological changes in the interior of the eye. Diagnosis of retinal abnormality requires an image that is sharp, clear and free of ... -
Impact of Wavefront-Guided Laser in situ Keratomileusis on Monochromatic Higher Order Aberrations and Vision
(University of Waterloo, 2008-07-04)Wavefront-guided (WFG) laser in situ keratomileusis (LASIK) differs from conventional surgery by applying a refined algorithm for tissue removal, based on information from preoperative wavefront aberration data. Since the ... -
In Vivo Imaging of Corneal Conditions using Optical Coherence Tomography
(University of Waterloo, 2006)Purposes: To use optical coherence tomography (OCT) to image and quantify the effect of various corneal conditions, in terms of corneal, stromal and epithelial thickness, and light backscatter. To assess the changes ... -
Investigating the enhancement of visual cortex plasticity through non-invasive brain stimulation
(University of Waterloo, 2024-01-02)Purpose: (1) To investigate the effects of various non-invasive brain stimulation (NIBS) modalities, including high-frequency transcranial random noise stimulation (hf-tRNS), anodal transcranial direct current stimulation ... -
Investigations on the Reptilian Spectacle
(University of Waterloo, 2012-12-12)The eyes of snakes and most geckos, as well as a number of other disparate squamate taxa, are shielded beneath a layer of transparent integument referred to as the “reptilian spectacle.” Derived from the embryonic fusion ... -
Modeling In Vitro Lipid Deposition on Silicone Hydrogel and Conventional Hydrogel Contact Lens Materials
(University of Waterloo, 2012-01-12)Purpose: To examine the variables that influence lipid deposition on conventional and silicone hydrogel contact lens materials and to build a physiologically relevant in vitro model of lipid deposition on contact lenses. ...