The medication to be studied is 1.25% povidone-iodine solution and the control medication is 5% natamycin ophthalmic suspension. The povidone-iodine concentration of 1.25% was chosen based on a study using povidone-iodine ophthalmic solution for the first week after ocular surgery. Initially, some patients complained of a stinging sensation when using the 2.5% concentration. This might prevent full compliance from some subjects. When the solution was diluted to 1.25%, there were no more complaints of discomfort. Therefore, in the actual one-week postoperative clinical trial, the 1.25 % concentration was used without any patient complaints and it was found to be effective. In a pilot study conducted in the Philippines, investigating treatment of small to medium-sized fungal corneal ulcers, 1.25% povidone-iodine was shown to be effective against fungal corneal ulcers including those caused by Fusarium solani and Mycelia sterila when treated for 7-20 days.