Gas Permeable Hard Contacts Scratches

Discussion in 'Contact Lenses' started by Noke, Jul 2, 2008.

  1. Noke

    Noke Guest


    When gas permeable hard contacts get scratches. What
    actually happens to the lens? Can anyone point me to any
    site with magnified view of a lens surface? I'd like to understand
    what goes on when polishing is done to "remove" the
    scratches. The technician said some scratches are deep
    and can't be removed. Can these cause corneal ulcers?
    How doe scratched lens surfaces damage the cornea?
    I'd like to kinda imagine what goes on between the cornea
    and lens with scratches and how does the frictions or
    contact occurs. Thanks.

    Noke, Jul 2, 2008
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  2. Noke

    Noke Guest

    In other words. Even the furrows with polished edge will not do good
    and one has to replace the entire lens everytime there is any trace
    of scratches in the gas permeable hard contacts?? Thanks.

    Noke, Jul 2, 2008
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  3. Noke

    Noke Guest

    About the furrows that can cultivate bacteria and fungi. Can't
    the lens each night remove the contents in the furrows? What would
    it take to remove it? I ordered a pair of gas permeable hard contact
    from a manufacturer. The right side doesn't have scratch, but
    unfortunately, the left side has a scratch in the middle. They
    it and there is still a trace of the scratch and they won't replace
    I can wait a week and order elsewhere but my present contact even
    has more scratches (about 20). So I am wondering whether to get
    it now or wait one more week for a new lens from another manufacturer.
    The decision depends on knowing whether a single furrow is harmful.
    Usually what would it take to remove the contents in the furrows like
    polishing compound and ground-up lens material? What ingreidents
    are polishing compound made of? Is it harmful to eyes? How
    about the ground-up lens material. Can it cause scratches in
    the eye? Thanks.

    Noke, Jul 2, 2008
  4. Noke

    Noke Guest

    BTW... letterings such as UV, etc. are often edged on the GP
    hard contacts lens itself. Were these lettering made of slumps?
    Arethe slumps hollow or did they fill it up with another glass filler?
    If hollow. Can they stuck up mucus, debris, bio-junk, bacteria,
    fungi, polishing material and/or ground up lens? If so. How
    come they put slump lettering when this can stuck up debris?

    Noke, Jul 3, 2008
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