منابع مشابه
[Cup-to-disc ratio asymmetry in adolescents].
PURPOSE To determine the frequency of asymmetries greater than 0.2 in the cup-to-disc ratio of a population of adolescents. METHODS Fundus photographs of both eyes of 123 adolescents were digitized at the resolution of 300 pixels per inch (300 dpi), 8 bits, with a RBG color pattern. The measurements were performed using the Image J software, version 1.42, developed by the National Institutes ...
متن کاملSimulated cup/disc ratio: a tool for ophthalmologists.
PURPOSE To evaluate and compare the observers' ability to measure simulations of cup/disc ratios (CDR) as concentric and non-concentric circles. METHODS In a prospective, random, and masked setting, 43 images representing the CDR spectrum from 0.2 to 0.9 for vertical and horizontal CDR measurements were developed and presented on a computer screen to 171 participants. RESULTS There were sat...
متن کاملAn optic disc grid: its evaluation in reproducibility studies on the cup/disc ratio.
A grid system is described which may be superimposed upon stereoscopic pairs of optic disc photographs. This grid system allowed reproducible inter- and intraobserver measurements of the cup/disc (C/D) ratio. The surface contour of the optic disc was not clear-cut in approximately 10% of the population studied, which led to a reduction in reproducibility of the measurement made within the group...
متن کاملThe disc damage likelihood scale: Diagnostic accuracy and correlations with cup-to-disc ratio, structural tests and standard automated perimetry
Our objective was to compare the diagnostic accuracies of and to determine the correlations between the disc damage likelihood scale (DDLS) and anatomical and functional tests used for glaucoma detection. A total of 54 healthy subjects (54 eyes) and 47 primary open-angle glaucoma patients (47 eyes) were included in this cross-sectional observational study. DDLS scores and cup-to-disc (C/D) rati...
متن کاملVertical cup/disc ratio in relation to optic disc size: its value in the assessment of the glaucoma suspect.
AIMS The vertical cup/disc ratio (CDR) has long been used in the assessment of the glaucoma suspect, though the wide range of CDR values in the normal population limits its use. Cup size is related physiologically to disc size and pathologically to glaucomatous damage. Disc size can be measured at the slit lamp as the vertical disc diameter (DD). The ability of the CDR, in relation to DD, to id...
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ژورنال
عنوان ژورنال: Annals of the Academy of Medicine, Singapore
سال: 2020
ISSN: 0304-4602
DOI: 10.47102/annals-acadmedsg.2019232