frames should be canted down?

Discussion in 'Glasses' started by dumbstruck, Dec 23, 2005.

  1. dumbstruck

    dumbstruck Guest

    Why are prescription frames so rarely canted down at all? Your normal
    gaze tends to be somewhat downward. Your skull geometry blocks upward
    angles and accomodates downward ones. Even when looking ahead, you are
    scanning downward such as to avoid tripping over things.

    Any reason why I shouldn't bend temple arms near the hinge to cant the
    frame down a bit, like so many dark glasses do anyway? Even with this
    I would be undercorrecting; it seems most frames are excruciatingly and
    unrealistically perpendicular (but maybe fragile to bend).

    Look at real usage of glasses on tv or in pictures. Many are
    perpetually looking thru lenses at almost 45 degree angle, and I mean
    for long views which excludes the bifocal issue. Sometimes this is
    exacerbated by habits of tilting the head back, or having a wide or
    high nosebridge that jacks the frame up higher than it was designed for
    (eg asia, africa)...
     
    dumbstruck, Dec 23, 2005
    #1
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  2. No problem; it's called pantoscopic tilt (or angle) and we do it all the
    time. Some frames can stand this adjustment more than others, esp. when
    done by the untrained. There is a limit, however, you don't want to
    tilt them so much that they look silly, or that when looking straight
    ahead you are looking through such a tilted lens that distortions are
    introduced. About 15 degrees is optimal.

    w.stacy, o.d.
     
    William Stacy, Dec 23, 2005
    #2
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  3. dumbstruck

    CatmanX Guest

    I rode a horse once, and canted down the road. Or was that cantered?
    It's late and I'm tired.

    LOL

    dr grant
     
    CatmanX, Dec 23, 2005
    #3
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