Mean, standard deviation (SD), and 95% confidence limits (mean (SD 2.00) for right and left eye visual acuity and interocular difference (IAD) for children categorised as having a normal refraction
| Analysis | 3 year olds (n = 84) | 4 year olds (n = 45) | ||
|---|---|---|---|---|
| Right eye | Left eye | Right eye | Left eye | |
| As the data were not normally distributed the median value and percentile limits (2.5th to 97.5th percentile) are also presented. | ||||
| Mean acuity (SD) | 0.200 (0.09) | 0.200 (0.08) | 0.140 (0.08) | 0.144 (0.07) |
| Median acuity | 0.180 | 0.200 | 0.100 | 0.125 |
| 95% confidence limits | 0.020 to 0.380 | 0.040 to 0.360 | −0.02 to 0.300 | 0.004 to 0.284 |
| Percentiles limits | 0.075 to 0.400 | 0.078 to 0.400 | 0.008 to 0.325 | 0.000 to 0.300 |
| Mean IAD (SD) | 0.03 (0.06) | 0.03 (0.04) | ||
| Median IAD | 0.00 | 0.025 | ||
| 95% confidence limits IAD | −0.09 to 0.150 | −0.05 to 0.110 | ||
| Percentiles limits IAD | 0.00 to 0.262 | 0.000 to 0.167 | ||