eye disorders
Introduction to Corneal Disorders
Introduction
The cornea is the clear layer in front of the iris and pupil. It protects the iris and lens and helps focus light on the retina. It is composed of cells, protein, and fluid. The cornea looks fragile but is almost as stiff as a fingernail. However, it is very sensitive to touch. Corneal disorders include the following: Bullous Keratopathy None Cogan Syndrome None Corneal Ulcer None Herpes Simplex Keratitis None Herpes Zoster Ophthalmicus None Interstitial Keratitis None Keratoconjunctivitis Sicca None Keratoconus None Keratomalacia None Peripheral Ulcerative Keratitis None Phlyctenular Keratoconjunctivitis None Superficial Punctate Keratitis None Corneal disease or damage can cause pain, tearing, and decreased sharpness of vision (visual acuity). A Slit-Lamp Examination , which is an instrument that enables a doctor to examine the eye under high magnification, is usually used to examine the cornea. During the examination, the doctor may apply eye drops that contain a yellow-green dye called 