Change in visual field (VF) for eyes with normal and abnormal (<1.1) preoperative N95:P50 ratios. Column percentages are shown.
| VF | Abnormal N95:P50 | Normal N95:P50 | Total |
| Worse | 1 (6.67%) | 5 (8.77%) | 6 (8.33%) |
| No change | 10 (66.67%) | 15 (26.32%) | 25 (34.72%) |
| Improved | 4 (26.67%) | 37 (64.91%) | 41 (56.94%) |
| Total | 15 (100.00%) | 57 (100.00%) | 72 (100.00%) |
Fisher's exact test (p=0.01).