Two groups for repetitive testing.
CAT. NO. 914 Small Illuminator Cabinet is necessary with these charts.
Contrast Sensitivity testing tells a doctor many things about a patients vision. Contrast vision testing can detect early signs of glaucoma or cataracts. Testing also monitors changes in contrast sensitivity vision before and after surgeries such as LASIK. With more contrast testing in clinics, early signs can be detected sooner and can lead to earlier treatment.