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noun. an open sore on the cornea

The cornea covers the iris and the round pupil, much like a watch crystal covers the face of a watch. A corneal ulcer usually results from an eye infection, but severe dry eye or other eye disorders can cause it.

Symptoms of corneal ulcers include:

  • redness of the eye

  • severe pain and soreness of the eye

  • the feeling of having something in your eye

  • tearing

  • pus or other discharge

  • blurred vision

  • sensitivity to light

  • swelling of the eyelids

  • a white spot on your cornea that you may or may not be able to see when looking in the mirror


Corneal ulcers can badly and permanently damage your vision and even cause blindness if they are not treated.

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