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Pink Eye Causes

Other Causes of Pink Eye

Pink eye is not necessarily caused by an infection with a virus, bacteria, or an allergic reaction. There are several other types of conjunctivitis, along with other eye conditions, that can cause a red or pink eye.
Other Types of Conjunctivitis
A fourth type of conjunctivitis is known as noninfectious, nonallergic conjunctivitis. It may also be called nonspecific conjunctivitis or go by a name more specific to the actual cause, such as mechanical, contact lens-related, or toxic conjunctivitis.
Some examples of factors that might cause this type of conjunctivitis include:
  • A foreign body in the eye that the body gets rid of on its own, such as dust or an eyelash
  • Medications that irritate the eye, including antibiotics, antivirals, and glaucoma medications
  • Trauma to the eye, such as from a cut, scratch, or chemical
  • Contact lens -- either from the lens itself or the impact of long-term decrease in oxygen to the eye from the contact lenses
  • Dry eyes.
Other Causes of a Pink or Red Eye
Besides conjunctivitis, there are a number of other conditions that can cause a red or pink eye. Some of these conditions can potentially be serious, and include:
  • Infectious keratitis
  • Iritis
  • Angle closure glaucoma
  • A foreign body in the cornea or conjunctiva
  • Hyphema
  • Hypopyon.
Other, less serious causes of a pink or red eye include:
  • A stye
  • Chalazion
  • Blepharitis
  • Canaliculitis
  • Dry eye syndrome
  • Subconjunctival hemorrhage
  • Episcleritis.
If you have a pink eye but also have changes in your vision, any trauma to the eye, pain, a severe headache with nausea, lights bother your eyes, or you wear contact lenses, contact your healthcare provider.
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Pink Eye (Conjunctivitis) Information

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