The cornea is the clear tissue at the front and center of the eye. Its transparency permits light to pass into the eye, through the pupil, lens, and onto the retina at the back of the eye.

What are the signs and symptoms of corneal disease?


  • Blurred or cloudy vision,
  • Pain
  • Tearing
  • Sensitivity to light.

What are the different types of corneal disease?

There are several conditions that can affect the cornea, including the following examples:

  • Infections - Bacterial, fungal, or viral keratitis, as well as parasitic diseases
  • Trauma - Abrasions or exposure to toxic chemicals
  • Corneal dystrophies and degenerations - Fuchs' dystrophy and keratoconus
  • Autoimmune disorders - Wegener's disease, rheumatoid arthritis, or lupus
  • Nutritional deficiencies - o Vitamin A deficiency
  • Allergies - Vernal and atopic keratoconjunctivitis
  • Growths - Pterygium or benign or malignant cancerous growths on the eye's surface

The cornea can also be damaged secondarily by other eye conditions such as tear film abnormalities (dry eye), eyelid disorders, and glaucoma.

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