Browsing Optometry and Vision Science by Issue Date
Now showing items 101-120 of 247
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Low Vision Service Provision by Optometrist: A Nationwide Survey
(University of Waterloo, 2014-01-29)Purpose: The prevalence of age-related visual impairment is projected to increase as the Canadian population ages. As a result, the demand for low vision service is also projected to increase. However, there is a lack ... -
MKH-Haase Charts of Binocular Vision Measurements: Repeatability and Validity of Associated Phoria and Stereotests
(University of Waterloo, 2014-01-29)Abstract Introduction: H.J.-Haase developed a systematic set of tests for evaluating binocular vision called the Pola Test. The Pola Test measures associated phoria and stereoacuity at distance and near using a variety ... -
Doppler SD-OCT Blood Flow Analysis and Extraneous Operator Influences
(University of Waterloo, 2014-01-30)Purpose: The RTVue-100 is a new instrument for measuring retinal blood flow (RBF), but image quality needs to be optimized in order for valid blood flow results. The primary aim of this thesis was to assess the presence ... -
STUDIES ON IMPACT RESISTANCE OF SPECTACLE LENS MATERIALS
(University of Waterloo, 2014-05-01)Introduction: The Canadian Standards Association (CSA) Z94.3-07 ballistic impact test for industrial lenses, tests the ability of a lens material to withstand the impact of a 6.4 mm diameter steel ball travelling at a ... -
Comparison of super-resolution algorithms applied to retinal images
(Society of Photo Optical Instrumentation Engineers, 2014-05-01)A critical challenge in biomedical imaging is to optimally balance the trade-off among image resolution, signal-to-noise ratio, and acquisition time. Acquiring a high-resolution image is possible; however, it is either ... -
Time Course of Dichoptic Masking in Normals and Suppression in Amblyopes
(Association of Research in Vision and Ophthalmology, 2014-07)Purpose.: To better understand the relationship between dichoptic masking in normal vision and suppression in amblyopia we address three questions: First, what is the time course of dichoptic masking in normals and amblyopes? ... -
Contact Lenses for Ciprofloxacin Drug Delivery
(University of Waterloo, 2014-07-31)PURPOSE The purpose of this thesis was to evaluate the potential of contact lenses as ciprofloxacin drug delivery devices. METHODS Investigations into ciprofloxacin uptake and release characteristics, and the possibility ... -
Can current models of accommodation and vergence predict accommodative behavior in myopic children?
(Elsevier, 2014-08)Investigations into the progression of myopia in children have long considered the role of accommodation as a cause and solution. Myopic children show high levels of accommodative adaptation, coupled with accommodative lag ... -
Computerized and Non-Computerized Colour Vision Tests
(University of Waterloo, 2014-08-05)Introduction: Measuring colour discrimination of people who carry out tasks where colour is used to convey information and accurate colour judgments are essential for safe and efficient performance of the task is important ... -
In Vitro and In Vivo Evaluation of Novel Ciprofloxacin-Releasing Silicone Hydrogel Contact Lenses
(Association for Research in Vision and Ophthalmology, 2014-08-08)Purpose.: The purpose of this study was to evaluate ciprofloxacin-releasing silicone hydrogel contact lens materials in vitro and in vivo for the treatment of microbial keratitis. Methods.: Model silicone hydrogel contact ... -
Retinal Haemodynamics in Primary Open Angle Glaucoma Patients with Differing Nocturnal Blood Pressure Profiles
(University of Waterloo, 2014-08-14)The impairment of ocular haemodynamics has been reported in primary open angle glaucoma (POAG) patients using various blood flow measurement techniques. Studies have shown hypotension may accelerate progression in POAG and ... -
The tear ferning test: a simple clinical technique to evaluate the ocular tear film
(Wiley, 2014-08-20)A healthy tear film is very important for many major functions of the ocular surface. Dry eye disease is a significant clinical problem that needs to be solved but the poor correlation between clinical signs and reported ... -
The Relationship between Tear Meniscus Regularity and Conjunctival Folds
(Wolters Kluwer, 2014-09-01)Purpose: To investigate the capability of a new portable digital meniscometer (PDM) to measure tear meniscus radius (TMR) and tear meniscus height (TMH) at different locations along the lower lid and to evaluate relationships ... -
An Investigation into the Effect of Increasing Target Size for Visual Sensitivity Measurement in Normals and in Early Glaucoma
(University of Waterloo, 2014-09-02)The clinical standard method of measurement for clinical visual sensitivity is currently Standard Automated Perimetry with a size III target (SAP III). However, there are many factors that can make the results unreliable. ... -
Application of a new grading scale for tear ferning in non-dry eye and dry eye subjects
(Elsevier, 2014-09-14)Purpose: To apply the Masmali tear ferning (TF) grading scale on non-dry eye (NDE) and dry eye (DE) subjects to test the validity of the grading scale in practice, and to describe the grading scale range for NDE and DE. ... -
Calibration and validation the Dynamic Photorefraction System (DPRS)
(University of Waterloo, 2014-09-25)Introduction: Our group has been measuring accommodation in myopic children. The instrument of choice has been the Power Refractor (Multichannel Systems). However, this instrumentation is no longer supported and runs on ... -
Extended Latanoprost Release from Commercial Contact Lenses: In Vitro Studies Using Corneal Models
(Public Library of Science, 2014-10-09)In this study, we compared, for the first time, the release of a 432 kDa prostaglandin analogue drug, Latanoprost, from commercially available contact lenses using in vitro models with corneal epithelial cells. Conventional ... -
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 ... -
Tear exchange and contact lenses: A review
(Elsevier, 2015-01)Tear exchange beneath a contact lens facilitates ongoing fluid replenishment between the ocular surface and the lens. This exchange is considerably lower during the wear of soft lenses compared with rigid lenses. As a ... -
MRI guided brain stimulation without the use of a neuro-navigation system.
(Hindawi Publishing, 2015-01-01)A key issue in the field of noninvasive brain stimulation (NIBS) is the accurate localization of scalp positions that correspond to targeted cortical areas. The current gold standard is to combine structural and functional ...