Data of 1810 phakic, perimetrically normal subjects from whom cut-off levels of normal and abnormal were derived
| Mean (SD) | Median | 97.5th percentile | 99.5th percentile | |
|---|---|---|---|---|
| IOP (mm Hg) | 14.29 (3.32) | 14 | 21 | 25 |
| Vertical cup-disc ratio | 0.39 (0.17) | 0.4 | 0.7 | 0.8 |
| Vertical cup-disc asymmetry | – | – | 0.2 | 0.2 |