Can SV lenses be upside down?

Discussion in 'Optometry Archives' started by Camelid, Jun 29, 2010.

  1. Camelid

    Camelid Guest

    I was wondering if SV lenses have to be oriented in a certain way, or
    if they can be upside down.

    Since I am very myopic, I can see the little symbols (micro
    engravings) on my new pair of glasses. I have drawn them in this
    diagram (jpg):
    http://members.shaw.ca/helfrich/glasses.jpg

    The diagram is head-on, as if you are looking at me. The lenses are
    Essilor SV 360 "digital". As you can see, the left lens (right lens in
    the diagram) is upside down. My question is, with single-vision
    lenses, does the orientation of the lens matter? Do the circles have
    to be 180 degrees (they are slightly angled), and the lens right-side-
    up? Or is the lens intentionally upside down because of my
    astigmatism?

    My old glasses prescription was:

    R: -12.00 -0.75 066
    L: -12.50 -1.00 172

    My new glasses prescription is:

    R: -11.75 -1.00 072
    L: -13.75 -025 169

    PD is 63 for both sets of glasses.

    I have had these glasses for three days, and so far, have not adjusted
    to them (my vision, both near and far, is better with my old glasses).

    Thanks very much.
     
    Camelid, Jun 29, 2010
    #1
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