Zaid N Mammo

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Radial peripapillary capillaries (RPCs) comprise a unique network of capillary beds within the retinal nerve fibre layer (RNFL) and play a critical role in satisfying the nutritional requirements of retinal ganglion cell (RGC) axons. Understanding the topographical and morphological characteristics of these networks through in vivo techniques may improve(More)
Retinal capillary networks are critically linked to neuronal health and disease. The ability to perform accurate in vivo examination of human retinal capillary networks is therefore valuable for studying mechanisms that govern retinal homeostasis and retinal vascular diseases. Speckle variance optical coherence tomography (svOCT) is a non-invasive imaging(More)
PURPOSE To investigate the relationship between sociodemographic factors and nonpersistence with topical glaucoma medication. DESIGN This was a retrospective, observational cohort study. PATIENTS AND METHODS We invited glaucoma patients on medical therapy from a general ophthalmology practice to complete a standardized questionnaire between November(More)
PURPOSE The purpose of this study was to correlate human retinal capillary network information derived from a prototype speckle variance optical coherence tomography (svOCT) device with histology to determine the utility of this instrument for quantitative angiography. METHODS A retina location 3 mm superior to the optic disk was imaged with svOCT in 14(More)
OBJECTIVE To evaluate and compare the preferences and attitudes of Ontario ophthalmologists and ophthalmology residents toward screencasting as an educational tool with potential use for continuing medical education (CME) events. DESIGN Cross-sectional study. PARTICIPANTS Eighty of 256 participants completed the survey. METHODS The surveys were sent(More)
PURPOSE To demonstrate the utility of speckle variance optical coherence tomography (svOCT), a noninvasive angiographic technique, for evaluating the foveal vasculature. METHODS Twelve normal human eyes were imaged with svOCT (1060-nm, 100-kHz custom-built system) and fluorescein angiography (FA; Topcon TRC-50DX with 5.0 megapixel resolution camera).(More)
OBJECTIVE To determine whether brand-name glaucoma drops differ from generic equivalents in bottle design, viscosity, surface tension, and volume in North America. DESIGN Experimental study. PARTICIPANTS We studied 5 bottles each of 11 kinds of glaucoma drops. METHODS Density-based calculations of drop volume were assessed using 0.1 mg analytic(More)
OBJECTIVE To evaluate the prevalence of undetected glaucoma in a Toronto population. DESIGN A cross-sectional survey. PARTICIPANTS Toronto residents aged 50 years or older. METHODS Telephone calls were randomly made to Toronto residents. Those who indicated they did not have glaucoma were invited to the Toronto Western Hospital for a comprehensive(More)
PURPOSE To evaluate the quantitative characteristics of the radial peripapillary capillary (RPC) network in glaucoma, glaucoma suspect, and normal eyes using speckle variance optical coherence tomography angiography (OCT-A). To determine correlations between RPC density, nerve fiber layer (NFL) thickness, and visual field indices. DESIGN Cross-sectional(More)