Revised Series Sloan Letter ETDRS® (Chart 2)
This revised eye chart incorporates a slight change in the difficulty score for each of the ten SLOAN letters derived from the best corrected visual acuity examinations of 7,420 eyes during the ETDRS® study.
$69.75
Product Variations
Description
This revised eye chart incorporates a slight change in the difficulty score for each of the ten SLOAN letters derived from the best corrected visual acuity examinations of 7,420 eyes during the ETDRS® study.
The three ETDRS® 2000 Series charts (Chart 1, 2, and 3) are balanced so that in each chart the ten SLOAN letters are represented at least once in every position.
Can be wall-mounted.
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.
