Narrow "Sweet Spot" for Sharp Focus

Discussion in 'Optometry Archives' started by John Keiser, Feb 9, 2005.

  1. John Keiser

    John Keiser Guest

    My Rx is R -5.75 -1.00 88
    L -6.50 -0.75 90

    Bifocal add +2.00

    I've always used basic plastic lenses in the past. Just got new eyeglasses
    [frames had gotten grundgy] with minimal change to the rx.

    But these are polycarb.

    My old glasses have such a broad "sweet spot" that I never paid attention to
    it at all. The new ones require that I look directly at an object. Moving
    my head 10 degrees side ways or up/down develops "some" distortion which is
    not noticeable on the old pair.

    I assume I can live with this if need be. But in case I decide to try for
    a refitting, is this a poly carb issue or what? These lenses are 56mm [old
    ones are 55mm] in case that's a factor.

    Thanks for any thoughts.
    John Keiser, Feb 9, 2005
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  2. John Keiser

    John Keiser Guest

    I think the grind, etc is fine.

    I probably should stick with cr39 in the future as impact resistance is not
    an issue.

    Thank you.
    John Keiser, Feb 9, 2005
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