4 Meter 2000 Series Revised ETDRS Chart "2" from Precision Vision®

Similar to the "Original" Series ETDRS chart, this revised version features the use of three separate charts for the testing of each patient's eyes separately and together. Each of the three ETDRS charts feature a different configuration of optotypes while keeping an equal difficulty level from beginning to end. These differences in optotypes help prevent memorization and create a controlled and repeatable visual acuity test.