A low contrast test is a special way to measure visual acuity;
determining how well eyes function in low light situations and/or being
able to distinguish objects from similarly colored or shaded
backgrounds. Testing is identical to the measurement of visual acuity at
high contrast level. The 2.5% test is the most practical test in
clinical use. Available in contrast levels: 5%, 10%, and
25%. This chart is to be used in an
ESV1200 or
Model A+ illuminated cabinet. Includes response key, training cards, recording forms and instructions.