Seeing the edge of RGP's

Discussion in 'Optometry Archives' started by Charles, Jun 10, 2006.

  1. Charles

    Charles Guest

    I've had my RGP's for a week now. The discomfort is going away, but
    I'm still sort of seeing the edge of them in my peripheral vision.
    This effect comes and goes from blink to blink and over longer time
    periods, but I do find it kind of annyoing, kind of like tunnel vision
    almost. I have my follow-up visit in a few days, but maybe some of the
    experts could tell me what options are available to address this? Do
    lenses come in different sizes? I read something on-line about ones
    that are "much" bigger and sort of taper off - when do these become


    Charles, Jun 10, 2006
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  2. Charles

    tkopan1 Guest

    Two things come to mind right away. If you are seeing the edge all the
    way around, the lens is centering but is too small. On the other hand,
    if you are seeing it just at the bottom, the lens is riding too high
    and not centering well. In either case, they need to be refit so that
    they center well and clear the edge of your pupils. A lens that rides
    high or does not center may cause an undesireable change in your
    corneal shape.

    --Dr. Tom
    tkopan1, Jun 10, 2006
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  3. Charles

    LarryDoc Guest

    OK. I'll go.

    You could be seeing either the edge of the lens or the central optical
    zone transition/junction. Either way, the lens is not staying centered
    over your pupil and the fit has to be changed.

    The solution depends upon the cause. Either the lens base curve and
    peripheral design needs to be altered, perhaps the lens needs to be
    larger or the optic zone larger. Or combinations of those things. Your
    practitioner can figure this out and you should have a better experience.

    LB, O.D.
    LarryDoc, Jun 10, 2006
  4. Charles

    Charles Guest

    Thanks for the replies. I seem to notice the edge thing most often to
    the outside. If I look at my eye in the mirror though, the lenses seem
    to be hanging quite low - the center of the lens well below the black
    part of my eye. You'd think I'd see the top of the lens, but I don't.

    Should problems with fit be apparent to the doc by inspection, or does
    it rely on me providing a very accurate description of symptoms? I'm
    hoping the former, because the effects are somewhat difficult to

    Charles, Jun 10, 2006
  5. Charles

    Neil Brooks Guest

    I'm going to offer my $0.02 ... from a patient perspective:

    FIT is something that the optometrist evaluates given the exact
    conditions in their exam room ... at that exact moment. If, for
    example, your eyes were tearing a great deal in response to a new RGP
    lens, then the fit might be different *at that exact moment* than it
    would, say, two weeks later, when you've adapted to your new lenses
    and the tear level has returned to normal.

    My personal experience with RGP's was pretty similar to yours: the fit
    looked/seemed pretty good while I was at the doc's office, but seemed
    to "get sloppier" a few days later.

    A lens tweak (by the doc) here or there pretty much always resolved
    Neil Brooks, Jun 11, 2006
  6. Charles

    LarryDoc Guest

    Yes, it should be apparent to the doc but feel free to fill him/her in
    with your symptoms.

    If the lens is fitting that low and is uncomfortable, I'd stop wearing
    it until you can be seen. When that time occurs, try to be wearing the
    lenses at least a hour so they're "settled in" and the doc can see the
    lenses fitting as they might outside the office situation.

    LB, O.D.
    LarryDoc, Jun 11, 2006
  7. Charles

    Quick Guest

    I should have mentioned they were always centered
    Quick, Jun 11, 2006
  8. Charles

    Charles Guest

    Actually,they're petty comfortable now, and they seem to be having some
    therapeutic effects. For one, I was having trouble with bloodshot eyes
    for a long time, and it seems to have completely gone away - like
    better than it's been for months. Also, my vision is better between
    wearings. I have a few pairs of glasses with less than my full
    prescription, and I see perfectly with them now. There seems to be
    some kind of retainer effect here that lasts at least 24 hours (the
    longest I've gone).

    Charles, Jun 11, 2006
  9. Charles

    Charles Guest

    The doc thought the lenses are fitting okay. He said they are low, but
    within tolerance, and trying to make them center would make them too
    tight so that they may rub at the edges and be less healthy (my
    paraphrase). As a result, he also doesn't want to go bigger because
    the bottom edges would end up too far down. So I need to live with the
    edge thing for now and see if it gets better over time (like maybe I
    just stop noticing, or maybe it'll be less obvious when I stop tearing
    so much).

    I was hoping to fine tune things, but I guess this is as good as it
    Charles, Jun 13, 2006
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