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Primary diagnoses of the patients in the two groups
| Primary diagnosis | Autologous serum (n = 29) | Umbilical cord serum (n = 31) |
| No (%) | No (%) | |
| Post penetrating keratoplasty | 18 (62.87) | 9 (29.03) |
| Chemical injury | 3 (10.34) | 7 (22.58) |
| Post vitreoretinal surgery | 2 (6.9) | 3 (9.68) |
| Post keratitis | 2 (6.9) | 4 (12.9) |
| Neurotrophic ulcer | 4 (13.79) | 8 (25.81) |
*All the variables were statistically similar in the two groups (p>0.05).
