Pelli-Robson Contrast Sensitivity Charts                                                                               View Shopping Cart

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.

Illumination of 85 cd/m² is key to good results.  Test is used at 40 in (1m). Includes two charts and two scoring pads.

(Click thumbnails to see larger picture)

          (Chart Diagram)                                    (Score Sheet)    

4497   Pelli-Robson Contrast Sensitivity Chart .......... Please Inquire (505) 275-2406

5132   Light Meter with Instructions .............................. $98.50

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