Table 1.
Foot | Meter | Decimal | logMAR |
---|---|---|---|
No light perception | 3.00 | ||
Light perception | 2.70 | ||
Hand motion | 2.30 | ||
Finger counting | 1.90 | ||
20/200 | 6/60 | 0.1 | 1.00 |
20/120 | 6/36 | 0.17 | 0.78 |
20/80 | 6/24 | 0.25 | 0.60 |
20/60 | 6/18 | 0.33 | 0.48 |
20/40 | 6/12 | 0.5 | 0.30 |
20/30 | 6/9 | 0.8 | 0.18 |
20/20 | 6/6 | 1.0 | 0.00 |
20/16 | 6/4.8 | 1.25 | −0.10 |
20/12.5 | 6/3.8 | 1.60 | −0.20 |
Abbreviation: logMAR, logarithm of the minimum angle of resolution.