The SpotChecks™ (an improved version of CamBlobs™) Contrast Sensitivity Chart was newly designed by Dr. John Robson to be an inexpensive alternative for players to self-monitor their contrast sensitivity and progress

Each test is a single use test where players test themselves by marking an “x” on each contrast target they see. Testing is intuitive; it only takes 2-3 minutes to complete the test and scoring the results is very easy and takes only a minute. The test sheet itself then becomes the record for the players file.