The new numbers contrast sensitivity chart for contrast sensitivity measurement
نویسندگان
چکیده
منابع مشابه
A Modified Middle Eastern Contrast Sensitivity Chart
The contrast sensitivity test has been used to examine vision in different clinical circumstances. Moreover, as contrast sensitivity is affected by several ocular states, its measurement has been considered practically for monitoring and assessment of a wide range of visual functions, predicting vision related abilities, diagnosing several ophthalmic conditions, and evaluating many ocular disor...
متن کاملThe Design of a New Letter Chart for Measuring Contrast Sensitivity
I. A consideration of methods for assessing contrast sensitivity leads to the conclusion that, for a clinical test, letters are more suitable than gratings. 2. A letter chart is described in which letters decrease in contrast but not in size. The letters are arranged in groups of three; successive groups decrease in contrast by a factor of IfJ2 from a very high contrast down to a contrast below...
متن کاملMeasuring contrast sensitivity
Contrast sensitivity defines the threshold between the visible and invisible, which has obvious significance for basic and clinical vision science. Fechner's 1860 review reported that threshold contrast is 1% for a remarkably wide range of targets and conditions. While printed charts are still in use, computer testing is becoming more popular because it offers efficient adaptive measurement of ...
متن کاملContrast sensitivity throughout adulthood.
Previous studies of spatial contrast sensitivity in adulthood have produced conflicting results. To clarify the situation, we measured contrast sensitivity functions on a large sample of adults (n = 91), ranging in age from 19 to 87. All observers were free from significant ocular pathology and were individually refracted for the test distance. Sensitivity for stationary gratings of low spatial...
متن کاملPsychophysical measurement of contrast sensitivity in the behaving mouse.
To understand how activity in mammalian neural circuits controls behavior, the mouse is a promising model system due to the convergence of genetic, optical, and physiological methods. The ability to control and quantify behavior precisely is also essential for these studies. We developed an operant visual detection paradigm to make visual psychophysical measurements: head-fixed mice make respon...
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ژورنال
عنوان ژورنال: Journal of Optometry
سال: 2011
ISSN: 1888-4296
DOI: 10.1016/s1888-4296(11)70054-1