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Eye Diseases

A quick look at some of the most common eye diseases diagnosed and often treated at Shannon Vision Care in Allen

“Eye diseases” is a blanket term that refers to a host of diseases relating to the function of the eye. Below we describe some of the more common types of eye diseases and how they are generally treated. For more in-depth information, please speak with your eye care provider at Shannon Vision Care and schedule an appointment today!

Conjunctivitis (Pink Eye)

Conjunctivitis, also known as pink eye, is an infection or inflammation of the conjunctiva – the thin, protective membrane that covers the surface of the eyeball and inner surface of the eyelids. Caused by bacteria, viruses, allergens and other irritants like smoke and dust, pink eye is highly contagious and is usually accompanied by redness in the white of the eye and increased tearing and/or discharge.

While many minor cases improve within two weeks, some can develop into serious corneal inflammation and threaten sight. If you suspect conjunctivitis, visit your eye care provider at Shannon Vision Care for an examination and treatment.

Corneal Abrasions

A corneal abrasion is a scratch on the eye’s cornea. The cornea is the clear, protective covering over the iris, which is the colored part of the eye, and the pupil — the black circle in the middle of the eye.

It’s important both for vision and for protecting the eye. If you poke your eye or if something gets trapped under your eyelid — such as dirt or sand — your cornea may become scratched. When it does, it can cause significant pain and discomfort.

If you get something in your eye, do not rub it. Try flushing it out with water or seek help from a doctor.

Corneal Ulcers

Corneal ulcers are most commonly caused by an infection with bacteria, viruses, fungi, or a parasite.

  • Acanthamoeba keratitis occurs in contact lens users, especially in people who make their own homemade cleaning solutions.
  • Fungal keratitis can occur after a corneal injury involving plant material, or in people with a suppressed immune system.
  • Herpes simplex keratitis is a serious viral infection. It may cause repeated attacks that are triggered by stress, esposure to sunlight, or any condition that impairs the immune system.

Corneal ulcers or infections may also be caused by:

  • Eyelids that do not close all the way, such as with Bell’s palsy
  • Foreign bodies in the eye
  • Scratches (abrasions) on the eye surface
  • Severely dry eyes
  • Severe allergic eye disease
  • Various inflammatory disorders

Contact lens wear, especially soft contact lenses worn overnight, may cause a corneal ulcer.