PV Numbers 25% Michelson Contrast Chart for 4 Meter Testing

Two groups for repetitive testing.

CAT. NO. 2425 ETDRS Illuminator Cabinet is necessary with this chart.

Studies and general practice has shown that regular contrast sensitivity testing can lead to the detection of early signs of many diseases. Some diseases include Glaucoma, Glare Problems, Parkinson's, and Cataracts. Also, by testing contrast vision during routine eye exams, more accurate and detailed records can be kept. Contrast vision changes throughout life and is different in each patient so accurate individual records are key to early detection of problems.