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  • FIRST POST
    • Roland Flagg
    • By Roland Flagg 18th Oct 19, 8:03 AM
    • 1,231Posts
    • 429Thanks
    Roland Flagg
    Understanding my glasses prescription?
    • #1
    • 18th Oct 19, 8:03 AM
    Understanding my glasses prescription? 18th Oct 19 at 8:03 AM
    I wear glasses for distance.

    My readings are:
    R: SPH -1.00 CYL -1.25
    L: SPH -0.75 CYL -1.00

    But these are no good for computer work.
    I've tried varifocals but can't get away with them.
    So I'm looking for a prescription just for computer work (I'm about 3ft away from the screen).

    So the rest of my prescription says:
    R: Near +1.75 Inter +1.25
    L: Near +1.75 Inter +1.25

    Am I right in thinking I should use only the Inter readings then deduct the SPH readings? So for computer work I need:
    R +0.25
    L +0.50

    Thanks.
Page 1
    • kirtondm
    • By kirtondm 18th Oct 19, 1:31 PM
    • 274 Posts
    • 194 Thanks
    kirtondm
    • #2
    • 18th Oct 19, 1:31 PM
    • #2
    • 18th Oct 19, 1:31 PM
    Get whoever is making up the specs to calculate the correct prescription for you
    • Roland Flagg
    • By Roland Flagg 18th Oct 19, 1:45 PM
    • 1,231 Posts
    • 429 Thanks
    Roland Flagg
    • #3
    • 18th Oct 19, 1:45 PM
    • #3
    • 18th Oct 19, 1:45 PM
    I'm buying cheap ones from the internet just to use on home PC.
    • Spoonie Turtle
    • By Spoonie Turtle 18th Oct 19, 2:50 PM
    • 225 Posts
    • 139 Thanks
    Spoonie Turtle
    • #4
    • 18th Oct 19, 2:50 PM
    • #4
    • 18th Oct 19, 2:50 PM
    I'm not sure the answer to your question in terms of what part is appropriate for computer work, but make sure to include the cylinder and axis values which are for astigmatism - things blurry in one particular direction on top of the normal short-/long-sighted blur.
    • kirtondm
    • By kirtondm 18th Oct 19, 2:50 PM
    • 274 Posts
    • 194 Thanks
    kirtondm
    • #5
    • 18th Oct 19, 2:50 PM
    • #5
    • 18th Oct 19, 2:50 PM
    still their responsbility to analyze the prescription just send them a copy and tell them its for VDU. Why take the risk of calculating it wrong yourself

    The persceription you have above is missing axis measurements.
    • sillyvixen
    • By sillyvixen 19th Oct 19, 11:12 PM
    • 3,323 Posts
    • 5,306 Thanks
    sillyvixen
    • #6
    • 19th Oct 19, 11:12 PM
    • #6
    • 19th Oct 19, 11:12 PM
    I wear glasses for distance.

    Am I right in thinking I should use only the Inter readings then deduct the SPH readings? So for computer work I need:
    R +0.25
    L +0.50

    Thanks.
    Originally posted by Roland Flagg

    Also include the cyl and axis as indicated on your glasses prescription.
    Dogs return to eat their vomit, just as fools repeat their foolishness. There is no more hope for a fool than for someone who says, "i am really clever!"
    • amandacat
    • By amandacat 27th Oct 19, 9:26 PM
    • 100 Posts
    • 71 Thanks
    amandacat
    • #7
    • 27th Oct 19, 9:26 PM
    • #7
    • 27th Oct 19, 9:26 PM
    It’s a little more complicated than your calculations due to the fact you have astigmatism. I bought some cheap ones from glasses direct and told them it was for intermediate vision and scanned my prescription. The glasses I received are now perfect for computer use.
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