Therapy failures and recurrence of disease in patients treated with topical interferon for conjunctival intraepithelial neoplasm (CIN)
| 1 million IU/ml | 3 million IU/ml | p Value | |
| Topical therapy alone unsuccessful at eliminating CIN | 19% (4/21) | 9% (1/12) | 0.41 |
| Salvage therapy after failure of topical interferon-α2b | |||
| Surgical removal of lesion | 2 | 0 | |
| Mitomycin C | 2 | 1 | |
| Resolution of CIN after salvage therapy | 100% (4/4) | 100% (1/1) | 1.00 |
| CIN recurrence in eyes where topical therapy successful | 12% (2/17) | 9% (1/11) | 0.82 |