Contrast sensitivity is the reciprocal of the contrast at threshold, i.e., one divided by the lowest contrast at which forms or lines can be rec-ognized. If a person can see details at very low …
The Hamilton–Veale contrast sensitivity chart has 8 lines of 4 letters. The letters are grouped in pairs. The 2 letters on the left have a greater contrast than the 2 letters on the right of the …
Test Right and Left eye using either Chart 1 or Chart 2. Binocular scores are not recorded. Distance of 1 meter (39.5 inches) from participant. Luminance of white areas in each corner …
#5013 Near Peli-Robson Contrast Sensitivity Chart Features Traditional Sloan Optotypes found in the Original Pelli Robson Chart 1 For use at 16 in (40 cm) Includes three charts, each of which …
Pelli-Robson Contrast Sensitivity Chart. The above log contrast sensitivities are correct to within ±0.05 at the time of calibration of the chart. Copyright ©2013 Denis Pelli, John
The Mars Letter Contrast Sensitivity Test is a set of charts for testing peak visual contrast sensitivity. While the more famil-iar visual acuity test assesses resolution of the eye and visual …
d) Log contrast sensitivity. For a chart of this kind, contrast is best defined as the difference in luminance between the letter and background, divided by the luminance of the background. …
differences in grating contrast sensitivity within the normal range over different grating sizes that can effect their visual capability. Differences in seeing letters, aircraft silhouettes, faces and …
Quick Instructions: Instruct patient to read letters left to right for each line, from top to bottom of the chart. Mark misses with an “X.” Terminate test on 2 consecutive misses. Important: Allow …
Pelli-Robson Contrast Sensitivity Charts. These charts cover ¾ of the original contrast range and are manufactured to the same true log steps and use the same letters and letter sizes as the …