On 3rd november'2015, my left eye was operated by pheco surgery for catract.but corneal edema occured .after taking medicines and drops ,the situation recovered after 1 and half month.but after 2 months,swelling of cornea occured again and medicine was started but on 3rd april'2016 again edema reccured. i have been advised to take softdrops 4 times a day and panthegel ointment 2 times and also vitamin A tablets , but still today edema is not clear,and the vision is glossy, kindly advise .