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There are 2 names in this directory beginning with the letter C.
Chalazia are chronic, sterile inflammations of the oil glands of the eyelid. The inflammation is a result of a blockage of the oil gland. Chalazia may become large enough to be associated with some localized pain, redness and tenderness. Treatment includes hot compresses and lid massage. Surgical intervention, to remove the lesion, may become necessary.

The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber, providing most of the eye's optical power. Together with the lens, the cornea refracts light as and a result helps the eye to focus, accounting for approximately 80% of its production and 20% of the lens focusing power.