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The clear lens that allows the light into the eye is the cornea.  The outer layer of the cornea is the corneal epithelium.  This can grow too thin for a variety of reasons; foreign materials, chemicals, viruses, bacteria, abrasions, or many other reasons.  Whatever the causes, a slight lessening of the epithelium is an erosion and a deeper wearing is an ulceration.  With ulcers, the tears can make their way into the second layer of the cornea, the stroma.  The stroma can then become cloudy, giving a grey or bluish appearance.  Most conditions can heal in a few days, but it can take weeks to heal.  While this can happen to any dog, older dogs have a much more difficult time recovering from this condition.  It will always be a painful condition for the animal.  Symptoms can include:

  • Rubbing of the Eye
  • Squinting
  • Excessive Tearing or Discharge
  • Discoloration of the Cornea
  • Redness of the Eye
  • Blurry Vision
  • Loss of Vision