Table 3 Sensitivity and specificity for various values of logMAR visual acuity as an indicator of whether ophthalmology intervention or admission to the ophthalmology ward is required.
LogMAR VA | Decimal Equivalent | Snellen Equivalent | Sensitivity | Specificity |
|---|---|---|---|---|
0.05 | 0.9 | 20/22 | 0.97 | 0.21 |
0.25 | 0.6 | 20/35 | 0.88 | 0.54 |
0.45 | 0.4 | 20/56 | 0.79 | 0.68 |
0.55 | 0.3 | 20/70 | 0.70 | 0.72 |
0.75 | 0.2 | 20/112 | 0.65 | 0.78 |
1.05 | 0.1 | 20/224 | 0.54 | 0.87 |
2.00 | CF | CF | 0.28 | 0.96 |
2.30 | HM | HM | 0.09 | 0.99 |
