Corneal hydrops is an uncommon complication seen in people with advanced keratoconus or other corneal ectatic disorders,[1] and is characterized by stromal edema due to leakage of aqueous humor through a tear in Descemet's membrane.

[2] Although a hydrops usually causes increased scarring of the cornea, occasionally it will benefit a patient by creating a flatter cone, aiding the fitting of contact lenses.

The person experiences pain and a sudden severe clouding of vision, with the cornea taking on a translucent milky-white appearance known as a corneal hydrops.

Once the medication cycle is complete and the cloud clears, scarring will be left on the cornea.

[citation needed] The effect is normally temporary and after a period of six to eight weeks, the cornea usually returns to its former transparency.