Images of visual distortion

Discussion in 'Optometry Archives' started by Gary, Jul 14, 2006.

  1. Gary

    Gary Guest

    Is there a site with photos of, or program that simulates, the effect of
    correcting particular levels of myopia, hyperopia and astigmatism when using

    Gary, Jul 14, 2006
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  2. Gary

    otisbrown Guest

    otisbrown, Jul 14, 2006
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  3. Gary

    otisbrown Guest

    otisbrown, Jul 14, 2006
  4. Gary

    otisbrown Guest

    Dear Gary,

    The intent of your question is not clear.

    If you have normal 20/20 vision (refractive state from zero to +1
    then you can SIMULATE 3 diopters of myopia by simply wearing
    a +3 diopter lens. That is the level of "blur" a -3 diopter myope will
    see in the distance, as well as the approximate "blur" on his Snellen.

    If you have a refractive state of zero (and 20/20) and wish to simulate
    a refractive state of +6 diopters, then the APPROXIMATE method
    would be to get a -6 diopter lens -- and wear it. If the person is
    young, however, his accommodation enable him to see through
    the +6 diopters.

    To simulate astigmatism (assuming you have none), then
    just get a cylender lens of -2 diotpters, and wear it.
    If you have a trial-frame, you can rotate the lens through
    an angle from zero to 180 degrees.

    Hope this helps clarify these issues for you.


    otisbrown, Jul 14, 2006
  5. Gary

    Quick Guest

    That's great. Can I add my reefer madness clips
    to the bottom?

    Quick, Jul 14, 2006
  6. Gary

    Gary Guest

    The intent of your question is not clear.

    To clarify, I was looking for examples of the effect when *viewing through
    glasses when correcting* varying degrees of myopia, hyperopia and
    astigmatism. I'm not wishing to simulate or see examples of it because I'm
    unaware of the effects, I was just hoping to see the effects such as
    minification and geometric distortion.

    Gary, Jul 14, 2006
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