Corneal

Corneal refers to anything related to the cornea, the transparent front part of the eye that covers the iris, pupil, and anterior chamber. The cornea, with the anterior chamber and lens, refracts light, with the cornea accounting for approximately two-thirds of the eye's total optical power.

Anatomy

The human cornea has a diameter of about 11.5 mm and a thickness of 0.5–0.6 mm in the center and 0.6–0.8 mm at the periphery. It is composed of several layers including the epithelium, Bowman's layer, stroma, Dua's layer, Descemet's membrane, and the endothelium.

Function

The cornea contributes to the eye's ability to focus by refracting light as it enters the eye. It is responsible for 65-75% of the eye's total focusing power, with the lens contributing the remaining 25-35%.

Diseases and disorders

There are many diseases and disorders that can affect the cornea, including keratitis, keratoconus, corneal ulcer, Fuchs' dystrophy, and corneal abrasion. These conditions can cause symptoms such as pain, blurred vision, tearing, redness, and sensitivity to light.

Treatment

Treatment for corneal diseases and disorders depends on the specific condition. It may include medication, corneal transplant, or other surgical procedures.

See also

• Eye
• Vision
• Ophthalmology

Corneal Resources
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