Secondary analysis ( performed October 11-25 , 2014 ) of a double-masked , multicenter , randomized , active comparator-controlled , clinical trial at multiple locations of the Aravind Eye Care System in South India that enrolled patients with culture - or smear-positive filamentous fungal corneal ulcers who had a baseline visual acuity of 20/40 to 20/400 ( logMAR of 0.3-1 .3 ) .