Comparison of our sample to a similar sample taken in the United States
| Visual characteristic | Present sample (n=221) | Brown et al (n=95)* | p Value |
|---|---|---|---|
| *Data taken directly as reported by Brown et al.3 | |||
| †Last two categories were compacted in order to perform a valid χ2 test. | |||
| Overall visual utility | 0.79 (SD 0.23) | 0.77 (SD 0.21) | 0.313 |
| Visual utility (stratified by vision in the better seeing eye) | |||
| 6/7.5 or better | 0.881 (SD 0.19) | 0.85 (SD 0.19) | 0.568 |
| 6/9 to 6/15 | 0.786 (SD 0.22) | 0.78 (SD 0.20) | 0.873 |
| 6/18 to 6/30 | 0.728 (SD 0.26) | 0.78 (SD 0.19) | 0.423 |
| 6/60 to 6/120 | 0.730 (SD 0.22) | 0.64 (SD 0.15) | 0.281 |
| CF to NLP | 0.478 (SD 0.47) | 0.59 (SD 0.37) | 0.741 |