Would an error in cylinder affect vision?

Discussion in 'Eye-Care' started by Conor, Dec 14, 2006.

  1. Conor

    Conor Guest

    Not sure if this has been done to death but what the hell. I'm
    wondering can a 0.25 diopter difference in cylinder have the
    effect I'm seeing. After all I get the impression that that's
    "equivalent" to 0.125 or so in sphere.

    My cylinder in my right eye is -.75 according to opticians, but it
    used to be -1.00 and was much better. Of course back in the day
    my optician rather than a salesbot did the fitting/pant tilt etc and
    glasses had wider frames so they fit better and were comfortable.

    My vision with the glasses I'm wearing is slightly odd (the
    problem being that opticians take that statement as "you're
    imagining things"). Each eye on its own doesn't seem too bad, but
    binocularly it's like the effect you get when you cross your eyes
    (a little bit), or tilt your glasses. It's most apparant when you look
    straight ahead so I've a tendency to sit slightly to the right of my

    Sorry to waffle but I'll throw in my history here. Um, at least in as
    much as I can remember (my original optician refused to give me
    my history - yes, I know he's required to but he just fobbed me off):

    -3.25 sph

    1990-93 No problems with these:
    R: -4.75 / -1.00x95
    L: -4.75 / -0.25x80

    1993-97 Not too bad as far as I remember! A little odd for reading.
    R: -5.25 / -1.00 x 90
    L: -5.50 / -0.50 x 85

    1997-2005 Problematic at times. Centres were wrong too (too
    wide). Better when I bent my right earpiece up a bit...
    R: -5.50 / -0.75 x 90
    L: -5.50 / -0.50 x 75

    2005 - now Bleugh. Centres right. Fit not great..
    Gonna get lasik if opticians won't care enough..
    R: -5.75 / -0.75 x 90
    L: -5.75 / -0.50 x 75

    Maybe I should just go self prescribe...!

    Conor, Dec 14, 2006
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  2. Conor

    otisbrown Guest

    Dear Conor,

    It is not probable that an error of 0.25 diopters or less in
    astigmatism will affect your vision.


    otisbrown, Dec 15, 2006
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  3. Conor

    Charles Guest

    Are you saying the poblematic glasses are smaller frames too? There
    might be something to that. My cylinder Rx is similar to yours and I
    was having fits with strangeness of vision (not bad acuity). My
    experience is that the eye docs don't really know how to help if acuity
    is good and you have no blatant binocularity problem. I went through a
    course of vision therapy trying to fix my problem. It may have helped
    some, but the real fix was to switch from glasses to RGP contacts. You
    might consider it.

    Charles, Dec 16, 2006
  4. Conor

    Conor Guest

    Well I'm saying it doesn't help if the distance between the temples is
    too narrow. The industry seems to have gone from the large 80s style to
    small frames without compensating for keeping the temple distance the
    same (at least here in Ireland with Specsavers and the like). The
    result is frames that squash the face and they slap in the spring
    hinges to compensate which is just silly.

    I believe the US consumer get a better deal here - more chains means
    you won't put up with that nonsense!

    I wear contacts for sport, they are certainly better in this regard.
    They start to burn after 8 hours or so though, probably because I
    seldom wear them. I could try wearing them more and see. Or lasik of

    Maybe having a squint when I was young might be a factor - I had an
    muscle operation on my right eye to correct it...


    Conor, Dec 16, 2006
  5. I think the .25 cyl difference can be part of the issue, but maybe the
    sphere is too strong.
    michael toulch, Dec 20, 2006
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