Original Series ETDRS Translucent Distance Charts (13 Feet, 4 Meter) from Good-Lite (Formerly Richmond Products, Inc.)

Proportional spaced (geometric progression) line sizes from 20/200 to 20/10 (6/60 to 6/3 equivalent). Standardized format used in National Eye Institute-sponsored studies. Used in clinical studies and low vision evaluations where accurate and repeatable visual acuitty measurements are needed. Can be wall-mounted. Measures 24.5"H x 25.5"W (62 cm x 65 cm)