pupil dilation & halos on bright lights

Discussion in 'Optometry Archives' started by Kyle, Oct 27, 2005.

  1. Kyle

    Kyle Guest

    My eyes were checked inside and I have pupil dilation
    drops near the after.

    My iris got wide and my lens accomodation is affected for

    At night. I can see all point sources light sparkling.
    Can anyone explain this? I own telescopes but no more
    how big it is, it never sees point sources as sparkling
    with halos.

    How come wide pupillary dilation can cause halos?

    Kyle, Oct 27, 2005
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  2. Because the outermost parts of the cornea have lots of aberrations,
    which are not involved with normal pupil size. The Designer made the
    peripheral cornea for structural support, not for vision.

    w.stacy, o.d.
    William Stacy, Oct 27, 2005
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  3. Kyle

    Kyle Guest

    Know what is the aberrations called. I am a telescope hobbyists.
    I know about spherical abberations, coma, astigmatism, turned
    down edge, glass roughness. I wonder what could be the
    equivalent in the cornea. Any idea?

    With the complexities of the human eye with rods, cones, optic
    nerve and the fact that blood is pumpued thru them every second
    from the heart. I wonder if natural evolution can create such.
    Or is there really a Designer of some kind.

    Kyle, Oct 28, 2005
  4. Kyle

    Kyle Guest

    I'm inquiring what kind of abberations are concentrated in the
    cornea in widely dilated pupils (surrounding the normal maximum opening

    which are not used in normal seeing)

    Kyle, Oct 28, 2005
  5. Well I think spherical abberation is the main one, but am sure there is
    a lot of coma, astigmatism, and just plain old light scatter from impure
    optics going on as well. Not sure how much of that has been quantified,
    but with wave scans becoming common, someone will anaylyze them.

    Re the Designer, I agree, there is just too much stuff going on around
    here to have happened by accident... Especially the beautiful stuff, and
    the sweet sounding, and, and, well just look around...

    w.stacy, o.d.
    William Stacy, Oct 28, 2005
  6. Kyle

    Dick Adams Guest

    Kurt Vonnegut said some words about that on the TV the other day:

    "My training is scientific, but I do feel that evolution is being controlled by some
    sort of 'divine engineer.' I can't help thinking that, and this engineer knows exactly
    what he or she is doing, and why, and where evolution is headed. That's why
    we've got giraffes and hippopotami and the clap."
    - 9/13/2005 on The Daily Show With Jon Stewart

    Personally, I would like to add myopia to the list.
    Dick Adams, Oct 28, 2005
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