TABLE 3

Measurements of Visual Acuity

SnellenDecimalLogMAR
ftm
20/206/61.000.00
20/306/90.67−0.18
20/406/120.50−0.30
20/606/180.33−0.48
20/806/240.25−0.60
20/1006/300.20−0.70
20/1606/480.13−0.90
20/2006/600.10−1.00
  • Visual impairment is 20/50 or worse; legal blindness is 20/200 or worse.

  • Data source: Holladay.13