Preoperative diagnosis
| Cases | Controls | |
|---|---|---|
| Indication for penetrating keratoplasty | n=50 (%) | n=50 (%) |
| Cases and controls were statistically comparable. χ2 value 3.80, p=0.42. | ||
| Corneoiridic scar | 16 (32) | 12 (24) |
| Healed corneal ulcer | 9 (18) | 8 (16) |
| Bullous keratopathy | 8 (16) | 16 (32) |
| Healed viral keratitis | 8 (16) | 8 (16) |
| Failed graft | 9 (18) | 6 (12) |