Reference: 250800
ETDRS Letters Chart - Far Vision
Description
ETDRS for FAR Vision, 3 meters
Letters
Designed and calibrated for V.A. at 3m. Also printed V.A. decimal at 1m equivalent.
ETDRS: - 0.1 logaritmical progression.
- 5 "square" letters per line.
- 15 lines.
- V.A. printed in: Decimal, logMAR & Snellen (3/...)
- High qualitiy Pvc . Thickness: 0.7cm. Dims: 60x50 cm.
V.A. at 3mt: from 0.1 dec (logMAR 1.0, Snellen 3/30) to 2.50 dec (-0.4, 3/1.2)
V.A. at 1mt: only dec printed: from 0.05 to 0.83.
