2.5% Low Contrast
Notations for testing at 4 meters (13 ft.)
Acuity range 40M to 2M (20/200, 6/60 to 20/10, 6/3
Measures 62 X 65 cm (24.5 X 25.5 In.)
Must be used with Cat.No. 2425 ETDRS Illuminator Cabinet
Includes test instructions, soft-tipped pointer and recording forms (Cat.No. 2514)
Low contrast testing is a useful tool in early diagnosis and accurate recordings of vision degeneration and disease. Contrast sensitivity testing helps to identify signs of glaucoma, cataracts, and glare sensitivity. By using a Tumbling "E" format, patients that are illiterate or not familiar with Roman letters can be tested. This allows for a larger patient population to be tested for contrast sensitivity.