Table 2.
Distribution of Visual Acuity (Given as Number and Percent of Children) without Correction, with Habitual Correction, with Self-Refraction, with Noncycloplegic Autorefraction, and with Cycloplegic Subjective Refraction among Study Participants (554 Children with Uncorrected Vision ≤6/12 in ≥1 Eye)
| Visual Acuity (n 554) Snellen (Decimal) | Without Correction
|
With Habitual Correction
|
Correction With Self-refraction
|
Correction with Noncycloplegic Autorefraction*
|
Correction with Cycloplegic Subjective Refraction
|
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| Better Eye | Worse Eye | Better Eye | Worse Eye | Better Eye | Worse Eye | Better Eye | Worse Eye | Better Eye | Worse Eye | |
| 6/6 (1.00) | 20 (3.6) | 88 (15.9) | 31 (5.6) | 321 (57.9) | 202 (36.5) | 507 (91.5) | 436 (78.7) | 525 (94.8) | 500 (90.3) | |
| 6/7.5 (0.80) | 25 (4.5) | 105 (19.0) | 68 (12.3) | 191 (34.5) | 207 (39.2) | 39 (7.0) | 95 (17.2) | 28 (5.1) | 43 (7.8) | |
| 6/9.5 (0.625) | 36 (6.5) | 95 (17.2) | 55 (9.9) | 28 (5.1) | 86 (15.5) | 2 (0.36) | 8 (1.4) | 1 (0.18) | 7 (1.3) | |
| 6/12 (0.50) | 66 (11.9) | 40 (7.2) | 102 (18.4) | 96 (17.3) | 10 (1.8) | 32 (5.8) | 1 (0.18) | 6 (1.1) | ||
| 6/15 (0.40) | 65 (11.7) | 77 (13.9) | 59 (10.7) | 100 (18.1) | 1 (0.18) | 6 (1.1) | 1 (0.18) | 3 (0.54) | ||
| 6/19 (0.32) | 38 (6.9) | 63 (11.4) | 31 (5.6) | 74 (13.4) | 2 (0.36) | 5 (0.90) | 1 (0.18) | 1 (0.18) | ||
| 6/24 (0.25) | 63 (11.4) | 50 (9.0) | 31 (5.6) | 40 (7.2) | 1 (0.18) | 6 (1.1) | ||||
| 6/30 (0.20) | 55 (9.9) | 65 (11.7) | 20 (3.6) | 36 (6.5) | ||||||
| 6/38 (0.16) | 56 (10.1) | 64 (11.6) | 14 (2.5) | 28 (5.1) | 2 (0.36) | |||||
| 6/48 (0.125) | 51 (9.2) | 68 (12.3) | 6 (1.1) | 12 (2.2) | ||||||
| 6/60 (0.10) | 58 (10.5) | 94 (17.0) | 3 (0.54) | 14 (2.5) | ||||||
| < 6/60 (<0.10) | 21 (3.8) | 33 (6.0) | ||||||||
| Median visual acuity | 0.25 | 0.20 | 0.625 | 0.40 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Mean visual acuity | 0.328 | 0.225 | 0.597 | 0.462 | 0.898 | 0.814 | 0.984 | 0.949 | 0.989 | 0.975 |
*
Visual acuity associated with the noncycloplegic autorefraction measurement was unavailable for 5 children.