SDN members see fewer ads and full resolution images. Join our non-profit community!

Question about the eyes

Discussion in 'Medical Students - MD' started by FutureMD, Aug 27, 2001.

  1. FutureMD

    FutureMD Junior Member 10+ Year Member

    Nov 10, 1999
    Can someone explain the "pain/discomfort" experienced when a person is exposed to sudden, bright lights after being fully dark adapted?

    I don't think the eyes have pain receptors.

    Is it the result of a feedback mechanism due to the over stimulus of the Iodopsin and/or the relaxing of the ciliary muscle?

  2. SDN Members don't see this ad. About the ads.
  3. turtleboard

    turtleboard SDN Advisor 10+ Year Member

    Jun 3, 1999
    New York, New York
    No pain receptors in the eye? Stab someone in the eye and ask him if it hurts. :)

    Is there an ophthalmologist in the house? Or how about a really, really advanced OD student? CPW? :)
  4. cpw

    cpw It's a boy !!! Moderator Emeritus 10+ Year Member

    Apr 25, 2001
    Well, I've only been in school ONE WEEK! But, I do know that the eye has pain receptors. Ever get an eye lash in there? Yeah, it HURTS!

    I'm not sure why it hurts... but my GUESS (and I mean guess) would be it's a reflex (since the bright light bleaches the photoreceptors and it's just not real good for you to be exposed to bright lights after dilation) to get you OUT of the sun/bright lights.

Share This Page