Distribution of topographic patterns seen at different time intervals post-PKP. For maps where no agreement was achieved, the classification of investigator 1 was considered
| Topographic patterns | 3 months No (%) | 6 months No (%) | 9 months No (%) | 12 months No (%) |
|---|---|---|---|---|
| I Non-astigmatic | — | 2 (2) | 4 (5) | 4 (5) |
| II Regular astigmatism | 36 (39) | 32 (35) | 29 (35) | 20 (24) |
| Oval | 4 (4) | 3 (3) | 6 (7) | 3 (4) |
| PSBT | 5 (5) | 7 (8) | 2 (2) | — |
| PABT | 16 (17) | 11 (12) | 8 (10) | 6 (7) |
| OSBT | 2 (2) | — | 5 (6) | 6 (7) |
| OABT | 9 (10) | 11 (12) | 8 (10) | 5 (6) |
| III Irregular astigmatism | 56 (61) | 58 (63) | 51 (61) | 61 (72) |
| PI | 16 (17) | 9 (10) | 10 (12) | 5 (6) |
| OI | — | 2 (2) | 2 (2) | 4 (5) |
| Mixed | 6 (7) | 3 (3) | 7 (8) | 7 (8) |
| SF | 8 (9) | 12 (13) | 9 (11) | 11 (13) |
| LS | 11 (12) | 15 (16) | 8 (10) | 16 (19) |
| Triple | 7 (8) | 6 (7) | 3 (4) | 3 (4) |
| Horseshoe pattern | 1 (1) | 2 (2) | 3 (4) | 3 (4) |
| Unclassified | 7 (8) | 9 (10) | 9 (11) | 12 (14) |
| Total | 92 | 92 | 84 | 85 |
Percentages have been rounded off to the nearest whole number.