Demographic data
| Group A | Group B | Group C | Total | |
| No (eyes) | 10 | 13 | 5 | 28 |
| Age (year) | 50.2 (25.6) (5–80) | 56.2 (17.5) (30–86) | 25.2 (14.1) (7–38) | 48.7 (22.7) (5–86) |
| Sex (M/F) | 7/3 | 5/8 | 4/1 | 16/12 |
| Cause of PED | ||||
| Neurotrophic/LD/exposure K/Mooren's ulcer | 9/3/1/– | 11/1/3/1 | 4/2/–/– | 24/6/4/1 |
| Aggravating conditions | ||||
| Bullous keratitis and graft rejection | 5 | 4 | 1 | 10 |
| KCS | 4 | 6 | 2 | 12 |
| Radiation | 1 | 3 | – | 4 |
| DM | 3 | 2 | – | 5 |
| SJS | 1 | 1 | 2 | 4 |
| HSK | 1 | 2 | 2 | 5 |
| Bacterial/fungal infection | 1/1 | 2/– | 2/– | 5/1 |
| Chemical burn/trauma | 1/– | –/3 | –/– | 1/3 |
| Keratouveitis | – | 1 | – | 1 |
| Previous surgeries | ||||
| Phacoemulsification | 2 | 3 | – | 5 |
| PKP/PKP+LT | 2 | – | 1 | 3 |
| Lid surgery for tumour removal | 1 | 2 | – | 3 |
| Glaucoma surgery | 1 | 1 | – | 2 |
| Pterygium excision/band keratopathy removal/glue | –/–/– | 1/1/1 | –/–/– | 1/1/1 |
| Previous management | ||||
| Soft contact lens | 4 | 5 | – | 9 |
| Patching | 4 | 2 | – | 6 |
| Tear supplement | 8 | 9 | 1 | 18 |
| Punctal occlusion | 2 | 3 | 2 | 7 |
| Tarsorrhaphy | 2 | – | 1 | 3 |
| Follow up | 12.8 (9.3) (3–30) | 10.9 (4.1) (5–15) | 7.5 (7.6) (1–20) | 10.9 (6.9) (1–30) |
↵Some cases had more than one condition. PED = persistent epithelial defect, Exposure K = exposure keratopathy, Bullous K = bullous keratopathy, KCS = keratoconjunctivitis sicca, DM = diabetic mellitus, SJS = Stevens-Johnson syndrome, HSK = herpes simplex keratitis, PKP = penetrating keratoplasty, LT = limbal transplantation, LD = limbal stem cell deficiency.