Table 1: Baseline Visual Acuity of Keratoconus Patients in the CLEK Cohort Study*.
| Vision Quality | Best Corrected Visual Acuity Range | Snellen Visual Acuity Better Eye, No. (%) | Snellen Visual Acuity Worse Eye, No. (%) |
|---|---|---|---|
| Normal range | 20/20 or better | 538 (44.7) | 169 (14.0) |
| Normal (without optical correction) | 20/21 to 20/40 | 612 (50.8) | 769 (63.9) |
| Fair | 20/40 to 20/69 | 43 (3.6) | 183 (15.2) |
| Poor | 20/70 to 20/199 | 10 (0.8) | 71 (5.9) |
| Poor (legal definition blindness) | 20/200 or worse | 1 (0.08) | 12 (0.9) |
*
CLEK indicates Collaborative Longitudinal Evaluation of Keratoconus