Contrast Sensitivity
Features Traditional Sloan Optotypes. For use at 100 cm (1m). Includes two charts which may be wall or easel mounted and score sheets.
Acuity Level 40M (20/800) at 1 Meter.
Unlike other similar products, The Original Pelli-Robson Chart has been trusted for decades in research and clinical trials. Exponentially mentioned more in the National Library of Medicine than any like-products.
The Gold Standard, manufactured exclusively by Precision Vision, Inc.
Starting Price: $295.00
Product Variations
Description
Features Traditional Sloan Optotypes
For use at 100cm (1m)
Includes two charts which may be wall or easel mounted and score sheets.
Illumination of 85 cd/m² is key to good results
Designed by DG Pelli, JG Robson and A J Wilkins, because they see contrast sensitivity as a realistic assessment of how well the patient sees large faint objects.
The chart follows the luminance, font, and letter spacing recommendations of the Committee on Vision of the National Academy of Sciences and National Research Council (Adv. Ophthal 41, 103-148, 1980).
The letter sequences are organized into groups of three (triplets) with two triplets per line. Within each triplet, all letters have the same contrast. The contrast decreases from one triplet to the next, even within one line.
The testing of contrast sensitivity on a regular basis is key to detecting early signs of diseases such as Parkinson’s, Glaucoma, and Cataracts. By testing with several different contrast levels configured together, the patient’s contrast sensitivity level is better assessed and records will be more precise.
Easel Available For Display alternative to wall mounting.
