Browsing Optometry and Vision Science by Title
Now showing items 232-244 of 244
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Ultraviolet B and blue light - induced phototoxic effects on retinal pigment epithelium using in vitro assays
(University of Waterloo, 2008-09-12)It is well known that ultraviolet (UV) B (280-315 nm) and blue light (400-500 nm) radiation can produce phototoxic lesions in the neural retina and the retinal pigment epithelium (RPE). In the first section of this thesis, ... -
Understanding concussion in para athletes with vision impairment
(University of Waterloo, 2023-02-15)Sports-related concussions occur in para sport as they do in able-bodied sport. There is evidence to suggest athletes with vision impairment (VI) may be more likely to sustain concussion injuries compared to athletes with ... -
Understanding the mechanisms of flicker defined form processing
(University of Waterloo, 2009-01-15)Flicker defined form (FDF) is a temporally-dependent illusion created by the counterphase flicker of randomly positioned element dots, that preferentially stimulates the magnocellular system. Previous studies have found ... -
Understanding the Mechanisms Underlying Brain Plasticity in Adult Humans
(University of Waterloo, 2017-09-22)Purpose: The human brain changes signi cantly with age. The plasticity of the visual cortex is thought to decrease into adulthood while childrens' brains are highly plastic. This change in plasticity is thought to be due, ... -
Understanding the sensory and motor behavior of accommodation in progressive myopic children
(University of Waterloo, 2017-09-27)Introduction: Accommodation and vergence, in unison, help in maintaining a clear and single binocular vision, a linchpin for normal vision development. Under natural viewing conditions, accommodation and vergence systems ... -
Unmasking the linear behaviour of slow motor adaptation to prolonged convergence
(Wiley, 2016-06)Adaptation to changing environmental demands is central to maintaining optimal motor system function. Current theories suggest that adaptation in both the skeletal-motor and oculomotor systems involves a combination of ... -
Uptake and release of preservatives from soft contact lens materials
(University of Waterloo, 2022-01-13)Purpose: The purpose of this thesis was to examine the uptake and release of myristamidopropyl dimethylamine (MAPD) and polyhexamethylene biguanide (PHMB) from soft contact lens material using various in vitro models to ... -
Use of OCT and Oculus Pentacam HR as Aids to Semi-Scleral Contact Lens Fitting
(University of Waterloo, 2013-09-03)Purpose: To determine whether semi-scleral contact lenses (sSCL) can be appropriately fitted using corneal sagittal depth measurements, and to determine the impact of fit on visual acuity, effect of time on topographic ... -
The Validation of a Novel Dynamic Visual Acuity Test, and Examination of the Effects of Different Factors on Dynamic Visual Acuity
(University of Waterloo, 2018-05-22)Purpose: When a target is in motion, two thresholds can be measured: dynamic visual acuity (DVA, the smallest target size at which an observer can resolve target detail) and speed threshold (the fastest target speed at ... -
Viability Profile of ex vivo Corneal Epithelial Cell Samples
(University of Waterloo, 2011-10-28)The corneal epithelium is a vital tissue which must retain its integrity to preserve vision and protect against harmful bacterial infections and other insults. Corneal disease represents the second most common cause of ... -
Visual correlates of balance and mobility in older adults: Can visual attention training improve performance?
(University of Waterloo, 2017-05-11)Falls among older adults is a serious problem facing our aging population. It is estimated that one in every three older adults aged 70+ fall every year; some of these experience multiple falls. Thirty five percent of ... -
Visual Functions in Parkinson’s Disease
(University of Waterloo, 2018-06-19)Background: Freezing of gait (FOG) is considered to be a motor disorder symptom that affects some Parkinson Disease (PD) patients; however, it is hypothesized that sensory systems may also be involved in FOG. Purpose: ... -
Visual Functions in Post-Concussion Syndrome
(University of Waterloo, 2018-10-24)Purpose: Post-concussion syndrome (PCS) is a is a complex neurological disorder in which various concussion symptoms can last for weeks, months, or even years after sustaining the concussion. The PCS population has been ...