The cornea is the transparent front part of the eye, which appears black in colour.Any disease (like injury or infection) of the cornea can lead to loss of corneal transparency and consequently decrease/loss of vision.

• Infection – mainly from scratches on the cornea and contact lens
• Injury – may lead to rupture of the cornea
• Post-operative (mainly after cataract surgery) loss of corneal transparency
• Diseases of corneal shape
• Rheumatological diseases affecting cornea.
• Contact lens related corneal diseases

• Pain
• Pain on looking at light
• Foreign body sensation
• Redness
• Whitish lesion on the “black part”(i.e. cornea) of the eye.