Topical Interferon Gamma-1b for Central Serous Chorioretinopathy

"Participant 1: 2 drops of topical interferon gamma-1b three times daily in the study eye for a daily dose of 42 μg~Participant 2: 3 drops 3 times daily in the study eye for a daily dose of 63 μg, if the 1st participant's dose is deemed well-tolerated by the investigator at Weeks 1, 2 and 4.~Participant 3: 3 drops 4 times daily in the study eye for a daily dose of 84 μg, if the 2nd tolerates the daily dose of 63 μg at Weeks 1, 2 and 4.~Participants 4 and 5: 4 drops 4 times daily in the study eye for a daily dose of 112 μg, if the 3rd tolerates the daily dose of 84 μg at Weeks 1, 2 and 4.~If the 63, 84 or 112 μg doses are not well-tolerated, subsequent participants will be enrolled at the prior dose level (42, 63 or 84 μg). Well-tolerated is defined as no corneal irritation (e.g., punctuate epithelial keratitis), no coexisting conjunctival erythema and edema, and no signs of more serious toxicities (e.g., intraocular inflammation or lens changes)."