Optometry and Vision Science: Recent submissions
Now showing items 21-40 of 210
-
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 ... -
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 ... -
Development of Form Visual Acuity in Infants Measured by Schematic Faces
(University of Waterloo, 2018-10-05)Purpose The purpose of this thesis was 1) to develop a test of visual acuity (VA) to measure recognition (form) acuity at a younger age than is currently clinically possible (3 years). Currently, it is only possible to ... -
Post Stroke Visual Midline Shift Syndrome
(University of Waterloo, 2018-10-01)Abstract Introduction The definition of an individual’s visual midline is the point which the individual perceives as being straight-ahead or “in front of their nose”. One of the perceptual consequences of a stroke for ... -
The Association between Visual Attention and Body Movement-Controlled Video Games, Balance and Mobility
(University of Waterloo, 2018-09-21)Purpose: Interactive video virtual-reality body movement games such as Xbox Kinect may have potential for training visual attention and physical fitness concurrently in older adults in order to reduce the risk of falls. ... -
Investigating the Effect of Mild TBI on the Global Processing of Form and Motion
(University of Waterloo, 2018-09-10)Purpose: Individuals with mild traumatic brain injury (TBI) often experience a range of visual symptoms. The cortical processing of visual information involves two parallel streams; the ventral stream (form perception) and ... -
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 ... -
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 ... -
Relationship between vessel diameter and depth measurements within the limbus using ultra-high resolution optical coherence tomography
(Elsevier, 2018-01-01)Purpose To establish a relationship between the diameter and depth position of vessels in the superior and inferior corneo-scleral limbus using ultra-high resolution optical coherence tomography (UHR-OCT). Methods Volumetric ... -
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: ... -
Assessment of Current and Next Generation of Colour Vision Tests for Occupational Use
(University of Waterloo, 2018-06-19)Introduction: Individuals with congenital colour vision deficiencies are at a greater risk of making an error in colour judgment. Computerized colour vision tests are now available to screen for colour vision defects and ... -
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 ... -
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 ... -
The adaptive elements of disparity vergence: Dynamics and directional asymmetries.
(University of Waterloo, 2018-04-24)Vergence eye movements alter the angle between the two visual axes, creating changes in binocular fixation distance. They are primarily stimulated by retinal image disparities, but can also be driven by inputs from ocular ... -
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 ... -
Contact Lenses and Tear Film Lipids.
(University of Waterloo, 2017-12-20)Introduction Lipids are essential tear components that aid the stability of the tear film (TF) to protect it from excess evaporation. The composition, conformation, and function of TF lipids are jeopardized by external ... -
Cellular changes at the lid margin
(University of Waterloo, 2017-11-28)PURPOSE: The hypothesis underlying this thesis is that CL wear, lid wiper epitheliopathy (LWE), and symptoms of dryness and discomfort may be manifest as cellular changes of the lid marginal epithelium, as a result of ... -
The correction of static and dynamic aniseikonia with spectacles and contact lenses
(Wiley, 2017-02-16)We describe a case of where significant anisometropic astigmatism was accompanied with considerable asthenopic symptoms. Symptoms were not alleviated by the prescribing of a partial spectacle correction. Subsequent treatment ... -
Investigation of vision strategies used in a dynamic visual acuity task
(University of Waterloo, 2017-10-24)Purpose: Dynamic visual acuity (DVA), the ability to resolve fine details of a moving target, requires spatial resolution and accurate oculomotor control. Individuals who engage in activities in highly dynamic visual ... -
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 ...