Low-contrast visual acuity versus low-luminance visual acuity in choroideremia
نویسندگان
چکیده
منابع مشابه
Luminance effects on visual acuity and small letter contrast sensitivity.
The purpose of this study was to evaluate the effects of luminance on visual acuity (VA) and small letter contrast sensitivity (SLCS). Computer-generated letter charts were used to measure VA and SLCS [6/7.5 (20/25) Snellen equivalent] as a function of stimulus luminance. Letter size (VA) and contrast (SLCS) were varied in equal logarithmic steps, making the task and scoring procedure comparabl...
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A 56 years old man was admitted to the ophthalmology department for low visual acuity since his 45 years old with no amelioration after optic correction. The physical exam found visual acuity at 1/10 on the right eye and 9/10 on the left one, clear cornea, intraocular pressure at 14 mmhg on both eyes, the fundus of the right eye showed multiple yellow mobile vitreous particles that are absent o...
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A large group of individuals with retinal disease were tested prospectively for contrast sensitivity by means of Arden gratings. A subgroup of 19 were also tested with the Nicolet automated television system. Individuals with macular or peripheral dystrophy showed a general reduction in contrast sensitivity as visual acuity decreased. The loss of contrast sensitivity was more prominent for high...
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Large and small letter contrast sensitivity and visual acuity were assessed in 37 elderly eyes (mean VA -0.01 logMAR, Snellen 6/6) and their lens opacities were categorised and graded using the LOCS III system. Large letter contrast sensitivity was often not reduced in cataract from age-matched normal values and provided limited information. Small letter contrast sensitivity was shown to be a m...
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IMPORTANCE There is a need for more sensitive measures of disease in intermediate age-related macular degeneration (AMD) to evaluate novel interventions more effectively and expediently. OBJECTIVE To determine if microperimetry and low luminance visual acuity can detect functional changes over a short duration of follow-up. DESIGN, SETTING, AND PARTICIPANTS Prospective longitudinal examinat...
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ژورنال
عنوان ژورنال: Clinical and Experimental Optometry
سال: 2021
ISSN: 0816-4622,1444-0938
DOI: 10.1111/cxo.13087