منابع مشابه
Entoptic evaluation of diabetic retinopathy.
PURPOSE Studies using optimized entoptic viewing of the parafoveal retinal vasculature have shown that normal subjects see their own capillaries with greater detail in the fovea than seen typically in fluorescein angiography. The authors have extended these investigations to persons with diabetes to evaluate the sensitivity, specificity, and accuracy with which they can detect and locate their ...
متن کاملThe extraordinarily rapid disappearance of entoptic images.
It has been known for more than 40 years that images fade from perception when they are kept at the same position on the retina by abrogating eye movements. Although aspects of this phenomenon were described earlier, the use of close-fitting contact lenses in the 1950s made possible a series of detailed observations on eye movements and visual continuity. In the intervening decades, many invest...
متن کاملEntoptic image quality of the retinal vasculature
Spatial details of entoptically visible retinal vessels were investigated using transcleral and Maxwellian-view stimulators. Nine normal subjects provided detailed drawings of the entoptic images which were digitized and superimposed onto digitized fundus photographs and fluorescein angiograms from the same eyes. Subjects also used a tracing method to locate visible entoptic features. The trans...
متن کاملOrigin of the foveal granular pattern in entoptic viewing.
PURPOSE To investigate the controversial origin of the foveal granular pattern at the center of the entoptic Purkinje vessel shadows. Both phenomena may be vividly elicited by oscillating a focused spot of light across the scleral surface of the eye in a circumferential direction. METHODS The site and pattern of oscillation of the light spot were varied and were correlated with the appearance...
متن کاملEntoptic visualization of the retinal vasculature near fixation.
The authors review (1) the range of techniques used to study the retinal vasculature near the fovea, (2) describe the need and rationale for noninvasive in vivo monitoring of the retinal vasculature, (3) present theoretic and practical considerations which show that entoptic visualization of the smallest capillaries near the fovea is optimized by a small short-wavelength source (1 mm or less) r...
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ژورنال
عنوان ژورنال: Transactions of the Optical Society
سال: 1905
ISSN: 1475-4878
DOI: 10.1088/1475-4878/7/1/309