Browsing Optometry and Vision Science by Issue Date
Now showing items 1-20 of 244
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Ocular Discomfort Upon Tear Drying
(University of Waterloo, 2003)<b>Purpose:</b> Assess the relationship between tear film drying and sensation between blinks. <b>Methods:</b> MATLAB sampled a slitlamp video camera, a potentiometer and a microphone while subjects kept one eye open ... -
A Study of Saccade Dynamics and Adaptation in Athletes and Non Athletes
(University of Waterloo, 2004)Purpose: The aim of the study was to delineate differences in saccade characteristics between a population of athletes and non athletes. Aspects specifically investigated were latency, accuracy, peak velocity, and gain ... -
Monocular Adaptation of Vestibulo-Ocular Reflex (VOR)
(University of Waterloo, 2005)Purpose: This study asks whether active horizontal angular Vestibulo-Ocular Reflex (VOR) gain is capable of monocular adaptation after 4 hours of wearing 10 dioptres (D) of induced anisometropia in healthy human adults. ... -
Study of the dynamic interactions between vergence and accommodation
(University of Waterloo, 2005)<em>Introduction:</em> Accommodation (change in ocular focus) and Vergence (change in ocular alignment) are two ocular motor systems that interact with each other to provide clear single binocular vision. While retinal ... -
Lysozyme Deposition Studies on Silicone Hydrogel Contact Lens Materials
(University of Waterloo, 2005)Over 60 proteins have been detected in the tear film and among these lysozyme has attracted the greatest attention. Several techniques for elucidating the identity, quantity and conformation of lysozyme deposited on soft ... -
Lipid Deposition on Hydrogel Contact Lenses
(University of Waterloo, 2006)The primary objective of this study was to quantify and characterise lipid deposition on soft (hydrogel) contact lenses, particularly those containing siloxane components. Studies involving a variety of <em>in vitro</em> ... -
BIOMECHANICAL ALTERATION OF CORNEAL MORPHOLOGY AFTER CORNEAL REFRACTIVE THERAPY
(University of Waterloo, 2006)<strong>Purpose:</strong> Although orthokeratology (non-surgical corneal reshaping, Corneal Refractive Therapy, CRT®) has been used for almost a half century, contemporary CRT's outcomes and mechanisms still require ... -
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 ... -
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 ... -
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 ... -
In vitro and ex vivo wettability of hydrogel contact lenses
(University of Waterloo, 2006)The wettability of contact lenses has become an area of intense research, with the belief that the more "hydrophilic" or wettable the lens surface is, the more comfortable the lens may be, as the posterior surface of the ... -
Retinal Blood Flow and Vascular Reactivity in Diabetic Retinopathy
(University of Waterloo, 2006-12-18)Introduction Retinal vascular reactivity is impaired in patients with diabetes and is thought to be involved in the onset and progression of diabetic retinopathy (DR). Previous studies that have utilized hyperoxia to ... -
The Relationship between Retinal Vascular Reactivity and Arteriolar Diameter
(University of Waterloo, 2006-12-18)ABSTRACT Purpose: The primary aim of the study (i.e. Chapter 3) was to compare the magnitude of retinal vascular reactivity in arterioles of varying diameter in healthy, young subjects. The secondary aims were to determine: ... -
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 ... -
The Role of MMPs, Smad3 and Heat Shock Proteins in TGF-β-Induced Anterior Subcapsular Cataract Development
(University of Waterloo, 2007-06-18)Transforming growth factor beta (TGF-β) has been implicated in anterior subcapsular cataract (ASC) development. In the first section of this thesis, an in-vitro rat lens model was used to determine the role of matrix ... -
Talking with and about older adult patients: The socializing power of patient-centered communication in an optometry teaching clinic
(University of Waterloo, 2007-07-31)In a teaching clinic, healthcare students and their supervisors talk with their patients in the examination room and they talk about their patients during teaching consultations outside the examination room. Effective ... -
Longitudinal impact of newly acquired closed-circuit televisions (CCTV) on quality of life for low vision patients
(University of Waterloo, 2007-08-09)Ongoing efforts to quantify changes in quality of life attributable to low vision rehabilitation have focused on the utility of a single test instrument to measure this multidimensional concept. It is hypothesized that ... -
The Application of Digital Filters to Improve Visibility for People with Maculopathy
(University of Waterloo, 2007-09-28)Purpose: Previous studies have shown that some digital filters can enhance picture-image visibility for people with visual impairment. The ultimate purposes of this study are to determine the improvement of picture-image ... -
Effect of vergence adaptation and positive fusional vergence training on oculomotor parameters
(University of Waterloo, 2008-01-24)Accommodation and vergence, the two important oculomotor systems, exhibit the property of adapation which maintains the response for comfortable prolonged viewing. Several mathematical models have been developed to describe ... -
Binocular adaptation to near addition lenses in emmetropic adults
(Elsevier, 2008-05)Near addition lenses are prescribed to pre-presbyopic individuals for treatment of binocular motor problems such as convergence excess and to control the progression of myopia. To date, no investigation has looked at the ...