Polycarbonate chromatic aberration

Discussion in 'Optometry Archives' started by Lacustral, Jul 16, 2003.

  1. Lacustral

    Lacustral Guest

    My prescription is:
    sph. cyl.
    +1.5 -3.0
    +1.25 -2.5
    reading +.75

    how many people notice chromatic aberration with polycarbonate with a
    prescription like that? I do care about chromatic aberration, i don't
    want to see obvious colorful fringes on the moon or on fluorescent lights.

    Laura
     
    Lacustral, Jul 16, 2003
    #1
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  2. Lacustral

    Rishigg Guest

    And there are people who maintain that glasses are a solution for
    imperfect sight.

    Such is the idiocy of mankind, at large.
    --
    "As surely as any soldier ever died on the field, Dr. Bates gave his
    life for a cause, battling against fate, during many years of
    magnificent struggle, when the unending disappointment finally broke in
    hopeless despair. His torch is still burning. There will come some other
    battler, who is fit, and will hold it high until the people who are
    sitting in darkness have seen its great light."
    William B. MacCracken, M.D.
    (1937, Berkeley CA)
     
    Rishigg, Jul 16, 2003
    #2
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  3. Lacustral

    Mark A Guest

    I once returned a pair of polycarb with bad color fringing (got a full
    refund). My Rx is:

    sph. cyl.
    +4.5 -1.0 (both L+R)
    reading +2.25

    The good news is that my Rx is much stronger than yours. The bad news is
    that I saw very noticeable fringing when reading. I don't know if your Rx
    would have this problem. Supposedly it is more prevalent in the higher lens
    powers like mine.

    One alternative (if you need lenses with high impact resistance and high
    tensile strength) is to get Hoya ECP lenses using Phoenix material (Trivex).
    Trivex has much better optics than other similar index materials, and has
    the safety features of polycarb. Younger Trilogy is another brand that is
    Trivex material (but their progressives are not as sophisticated as the
    ECP).

    If you don't need the safety features of polycarb, you can go with high
    quality material like Spectralite 1.54 (available on Sola lenses) or a 1.60
    plastic (not as good optical quality as Trivex or Spectralite, but better
    than polycarb). Spectralite has very good optics and should be light and
    thin enough at your Rx. The Solamax is a popular lens design from Sola that
    can be ordered with Spectralite.
     
    Mark A, Jul 16, 2003
    #3
  4. That is an interesting prescription! I believe that it could also be written

    sph. cyl.
    0 -1.5
    0 -1.25
    reading +3.0 close enough

    It depends whether the initials after your name are MD or OD. The optical
    physicist would name the refraction error as pure astigmatism. For the
    technically inclined, there would be only one Zernicke polynomial in the
    aberration expansion. But hell, what do physicists know about health matters
    compared to physicians?

    Dr. Bill (not MD or OD)
     
    Repeating Decimal, Jul 16, 2003
    #4
  5. Lacustral

    Lacustral Guest

    Yes it is. I have oval eyeballs, like a bug. (bugs do not care about the
    shape of their eyeballs since their eyeballs are paved with individual
    little eyes)

    Thanks everybody for your answers. i appreciate informative advice that isn't
    aimed at selling me on something ...

    laura
     
    Lacustral, Jul 16, 2003
    #5
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