**6. Grading of acute hydrops**

Acute hydrops can be graded depending on the corneal region involved. Corneal edema can be graded by drawing an imaginary circle around the cornea [41].

Grade 1: Involves 3-mm diameter of cornea. Grade 2: Between 3- and 5-mm diameter of cornea. Grade 3: More than 5 m-diameter of cornea.
