That's some real funny stuff, Glenn.

Discussion in 'Optometry Archives' started by Dr. Leukoma, May 17, 2005.

  1. Dr. Leukoma

    Dr. Leukoma Guest

    OK, we all know Wal is from Oz, but the laws of terrestrial physics
    apply there as well. One thing he should know is that because of his
    high astigmatism, his ablation was not a circle, but an ellipse, and
    that the narrow part of the ellipse is likely less than his pupil
    diameter in dim lighting.

    Virtually all increases in HOA following LASIK is related to
    topography. This has been shown experimentally. There is a term for
    the residual peripheral myopia following LASIK. It's called spherical
    aberration. It's a fourth order Zernicke. There is another term that
    would probably describe the residual peripheral astigmatism. It's
    called coma.

    When Wal gets his spectacles, the prescription needs to specify that
    the correction for the astigmatism be ground into the periphery of the
    lenses, and that there should be no prescription in the center. I'm
    sure the optician will know exactly what I mean (heavy sarcasm).

    Dr. Leukoma, May 17, 2005
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