This document is the property of DEPISTEO. Its contents cannot be reproduced or divulged without the company's approvalPage 55 / 78V04.07.00March 20185.3. Contrast sensitivity testContrast sensitivity test5.3.1. PurposeDemonstrates a decrease in contrast sensitivity. Contrast sensitivity is typically a retinal function and adecrease can indicate an alteration of the retina. It is also decreased in certain diseases such as cataractsand chronic glaucoma.Decrease in contrast sensitivity is physiological in night vision.The acuity level of this test is constant (20/100). Only the contrast decreases with each letter, from 100to 1.2 % like this:Contrast sensitivity (%)100 80 63 50 4032 25 20 16 12.510 8 6.3 5 43.2 2.5 2 1.6 1.25.3.2. Patient instructions“From the first line, read all the letters”. Check the response
