The cornea is the transparent part of the eye that covers the front portion of the eye. It covers the pupil (the opening at the center of the eye), iris (the colored part of the eye), and anterior chamber (the fluid-filled inside of the eye).
Corneal disease: refers to a variety of conditions that affect mainly the cornea. These include infections, degenerations, and many other disorders that may arise mostly as a result of heredity. Corneal disease or damage can cause pain, tearing, and decreased sharpness of vision (visual acuity).
a) Conjunctivitis (red eye).
b) Corneal dystrophies and degenerations.
c) Corneal infections (Corneal ulcer).
d) Ectatic corneal diseases like keratoconus, keratoglobus and pellucid marginal degeneration.
e) Eye allergies Corneal complications arising from other forms of ocular surgery.
f) Ocular surface disorders like Blepharitis, Meibomitis, conjunctival and scleral diseases.