Tools
Acuity Converter
logMAR
0.30
Decimal
0.50
Metric
6/12
ETDRS letters
70
≈ 85 − 50 × logMAR
SnellenMetricDecimallogMARLetters
Count fingers ≈ logMAR 1.9 · Hand motion ≈ 2.3 · LP ≈ 2.7 · NLP ≈ 3.0 (Schulze-Bonsel / Lange conventions for statistics).