Announcement

Collapse
1 of 2 < >

Scheduled Update

ATTN: The forums will be down part of the day of March 31 for a scheduled update.
2 of 2 < >

Attn: Anyone Who Requested Registration and never got a response.

We normally get back to people on registration requests within a few business days. If you don't hear back from us within a week it may be because we're having difficulty with your email address. If you included your username in your request we've probably registered you already and just can't send you the information. You can give us a call at 1-877-693-7939 between the hours of 8am-4am Pacific time. We'll have your information set aside to give to you in the event attempts to send to your email didn't work.
See more
See less

Why does the dry eye cause photophobia?

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Why does the dry eye cause photophobia?

    A question without clear answers, still... It is very important to understand this. Photophobia is a major symptom of dry eye and therefore your etiology needs to be carefully studied to obtain solutions. I think the dry eye causes photophobia by the increased sensitivity to light of the nervous ocular surface. This increased sensitivity in turn can be caused by friction of the lids on the ocular surface. Maybe the tear also functions as a bandage, regulating over-stimulation. I also still think that the decrease in tear may allow greater passage of light to the retina, sensitizing it.
    Hugs

  • #2
    http://milnesjs.com/DryEyes.aspx

    "Light sensitivity is caused by dry eye, because as a result of the uneven tear film, the light entering the eye, hits the retina at irregular angles. Adding to that is the complication of an irregular cornea, or distortion caused by ocular surface disease...".
    Every day with DES is like a box of chocolates...You never know what you're going to get.

    Comment


    • #3
      Originally posted by kitty View Post
      http://milnesjs.com/DryEyes.aspx

      "Light sensitivity is caused by dry eye, because as a result of the uneven tear film, the light entering the eye, hits the retina at irregular angles. Adding to that is the complication of an irregular cornea, or distortion caused by ocular surface disease...".
      I think it is hard to believe it's only about uneven tear film. I think it may have something to do with epithelial damage...

      Comment


      • #4
        Kitty, interesting! Bakunin, I agree with you! At least, the Kitty found a official explanation! Let's try to find others explanations.
        Last edited by cvowr; 27-Feb-2012, 10:44.

        Comment


        • #5
          I agree with bakunin. Severe photophobia (eg photophobia that significantly limits your ability to carry out everyday tasks like use a computer or drive even with sunglasses on) is very unlikely to be caused purely by dry eye. I know some people do experience severe photophobia with clinically mild dry eye (eg no corneal damage) but I think most cases of photophobia in dry eye are due to secondary issues particularly inflammation of cornea (keratitis), damage to surface of cornea including abrasions, ulcerations, erosions etc...

          Comment

          Working...
          X