Pelli-Robson Contrast Sensitivity Chart

Contrast sensitivity is believed to be a realistic assessment of how well a patient can see large, faint objects. Designed by DG Pelli and JG Robson, the Pelli-Robson Contrast Sensitivity Chart features traditional sloan optotypes and meets the recommendations and requirements of both the Committee on Vision of the National Academy of Sciences and the National Research Council.

Frequent testing of contrast sensitivity can help detect early signs of Parkinson's, Glaucoma and Cataracts. This is an ideal chart to help provide precise records to monitor these conditions.

Features of the Pelli-Robson Contrast Sensitivity Chart

• Includes two charts and scoring pads
• Both the charts and pads are suitable to be wall or easel mounted for convenience 
• Designed to be used at 40 inches (1m)
• Features traditional sloan optotypes
• Follows the luminance, font and letter spacing as recommended by the aforementioned bodies
• Suitable for testing early signs of Parkinson's, Glaucoma and Cataracts
• Helps provide precise records in the patient's development

Technical Details for the Pelli-Robson Contrast Sensitivity Chart

• Illumination of 85cd/m² indicates good results
• Letters organised into groups of three, with two triplets per line
• Each triplet has the same contrast
• Contrast decreases from one triplet to the next, even within the same line
• Use at 40 inches (1m)
• Dimensions
  • Chart in box (WxHxD): 68 x 93 x 3cm
  • Chart unboxed (WxHxD): 60 x 85 x 1cm