Horizontal tilt effects

Discussion in 'Optometry Archives' started by Nicole, Jun 1, 2009.

  1. Nicole

    Nicole Guest


    If the eyeglasses are narrower than the face, the ear levers are
    stretched when wearing them, causing the glasses to
    tilt in the horizontal position (by some bending in the nose
    wire). What kind of aberrations would this cause and how bad is it
    compared to vertical tilt?

    Nicole, Jun 1, 2009
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  2. Nicole

    Nicole Guest

    But there seems to be a difference. In vertical tilt. Things
    just appear slanted. In horizontal tilt where the outer glass
    near the ears moves outward compare to the glass near
    the nose because of bending in the nose wire, you have to
    do cross eyes to focus.. affecting vergence. Isn't it more
    taxing for the eyes than vertical tilt?

    I just want a good theoretical understanding of it. Doesn't
    mean it's happening to my glasses. Because I see some
    students with glasses narrower than their face and wonder
    about the vergence problem they may encounter. What
    do you think is the worse problem it can cause, like
    perhaps eyestrain on their part or is it only the appearance
    of things and vergence mechanics not altered?

    Nicole, Jun 1, 2009
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