Browsing Optometry and Vision Science by Issue Date
Now showing items 41-60 of 246
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The Investigation of Tear Film Osmolality as a Clinical Instrument Used in Assessments of the Tear Film and Dry Eye Disease
(University of Waterloo, 2010-01-11)Introduction: Tear film osmolality is a product of the varying concentrations of dissolved solutes (proteins, lipids and mucins) in the tear fluid. Research suggests that a hyperosmotic tear film is a trait common to ... -
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 ... -
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 ... -
Statistical Analysis of Hartmann-Shack Images of a Pre-school Population
(University of Waterloo, 2010-01-22)The impact of uncoordinated growth of the optical components of the eye may stimulate different levels of monochromatic aberrations in the growing eyes of the children. This thesis aimed to examine the impact of age, visual ... -
The appearance of hyper-reflective superficial epithelial cells observed using in vivo confocal microscopy
(University of Waterloo, 2010-01-22)Purpose: Hyper-reflective superficial cells were an unexpected finding while examining the corneal epithelium using confocal microscopy (CM), during an MSc thesis conducted in 2006 at the University of Waterloo, Canada. ... -
Investigating The Impact of Multipurpose Solutions Released From Silicone Hydrogel Lenses on Corneal Epithelial Cells, in vitro
(University of Waterloo, 2010-01-22)Cytotoxicity of Multi-Purpose Solutions (MPS) is commonly tested on cells using diluted MPS or extracts from MPS soaked contact lenses. There is evidence that lens type will affect uptake and release of compounds contained ... -
Sensitivity Across the Ocular Surface—Fundamental Findings and Clinical Applications
(University of Waterloo, 2010-04-29)Current understanding of sensitivity and sensation experienced across the ocular surface remains limited. This project explored the regional variation of corneal sensitivity and transducer function, interaction of sensory ... -
Impact of Light Scatter on the Assessment of Retinal Arteriolar Hemodynamics
(University of Waterloo, 2010-04-29)Introduction and Purpose: Vascular pathologies play an important role in the etiology and progression of number of ocular diseases. Many instruments are developed to monitor retinal hemodynamics, including the Canon Laser ... -
In vitro analysis of wettability and physical properties of blister pack solutions of hydrogel contact lenses
(University of Waterloo, 2010-04-30)Contact lens success is primarily driven by comfort of the lens in eye. Over the years, many modifications have been made to the lens surface and bulk material to improve comfort of the lens, however 50% of contact lens ... -
Development and application of a new Attended Field of View (AFOV) test
(University of Waterloo, 2010-05-21)Purpose: An important challenge for eye care practitioners is meeting the needs of an ever-increasing elderly population. Standard vision tests are inadequate for determining performance in real life situations. One test ... -
Bifocals in children with Down syndrome (BiDS)
(University of Waterloo, 2010-07-28)Down syndrome (DS) is the most common genetic cause of mental challenge in individuals and is associated with many ocular disorders. One of these anomalies which is frequently present in this population is reduced accommodation ... -
Retinal Blood Flow and Markers of Vascular Inflammation and Endothelial Dysfunction in Type 2 Diabetes
(University of Waterloo, 2010-09-01)Abnormal leukocyte adhesion (i.e. leukostasis) to retinal vascular endothelial cells occurs in early diabetes. The processes of leukostasis have been clearly demonstrated in the vascular endothelium of patients with diabetes. ... -
Novel methods for the evaluation of the tear film in the diagnosis of dry eye
(University of Waterloo, 2010-09-27)Dry eye is a complex, multi-factorial disease that results in a compromised tear film and ocular surface. Clinicians and researchers alike have historically relied on an individual’s symptoms to diagnose and manage the ... -
In vitro ultraviolet–induced damage in human corneal, lens, and retinal pigment epithelial cells
(Molecular Vision, 2011-01-21)Purpose: The purpose was to develop suitable in vitro methods to detect ocular epithelial cell damage when exposed to UV radiation, in an effort to evaluate UV-absorbing ophthalmic biomaterials.Methods: Human corneal ... -
Reading Additions in Children and Young Adults with Low Vision – Effects on Reading Performance
(University of Waterloo, 2011-02-24)Reading is one of the most important activities in most people’s life. For children, reading is a window to knowledge, good educational achievement and better job opportunities in the future. Thus reading fluency is a very ... -
Effect of near adds on the variability of accommodative response in myopic children
(Wiley, 2011-03)Purpose: Higher variability of accommodative response (VAR) has been reported in myopes and speculated to be a possible risk factor for the progression of myopia. We investigated whether near adds of +2D and −2D were capable ... -
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 ... -
Near addition lenses as a tool to investigate vergence adaptation in myopic children
(University of Waterloo, 2011-08-12)Accommodation and vergence are two interacting ocular motor systems that function to maintain clear and single vision across a wide range of distances. Sustained fixation results in the adaptation of these ocular motor ... -
Gaze strategies for coping with glare under intense contra light viewing conditions – A pilot study
(University of Waterloo, 2011-09-30)Purpose: This is a pilot study to investigate gaze strategies for coping with glare when performing a simple visual task under intense contra light viewing conditions. Method: Twenty-four normally sighted participants ... -
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 ...