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Change in the Axis of Keratometric Astigmatism from Pre-TPS to Post-TPS
| Post-TPS K axis | ||||||
|---|---|---|---|---|---|---|
| WTR (60–120) | ATR (0–30, 150–180) | OBL (30–60, 120–150) | Total | |||
| Pre-TPS K axis | WTR (60–120) | n | 3 | 1 | 2 | 6 |
| % | 12.0 | 4.0 | 8.0 | 24.0 | ||
| ATR (0–30, 150–180) | n | 1 | 12 | 1 | 14 | |
| % | 4.0 | 48.0 | 4.0 | 56.0 | ||
| OBL (30–60, 120–150) | n | 1 | 1 | 3 | 5 | |
| % | 4.0 | 4.0 | 12.0 | 20.0 | ||
| Total | n | 5 | 14 | 6 | 25 | |
| % | 20.0 | 56.0 | 24.0 | 100.0 | ||
Notes:
, axis of orientation changed; 
, no change in axis of orientation.
