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Thread: What is the definition of Balance Lens ?

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    What is the definition of Balance Lens ?

    Thanks

    James

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    Cape Codger OptiBoard Gold Supporter hcjilson's Avatar
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    A lens of similar type (matching bifocal in the case of lined bifocals) or just single vision, without a specific foci, that is close enough in power to "balance" the appearance of the other lens. Years ago I saw it written out on an Rx."Balance for appearance".
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    Bad address email on file Dougfir8's Avatar
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    I believe this would include balancing for weight too. You can also use a single vision lens to balance a PAL.
    Quote Originally Posted by hcjilson View Post
    A lens of similar type (matching bifocal in the case of lined bifocals) or just single vision, without a specific foci, that is close enough in power to "balance" the appearance of the other lens. Years ago I saw it written out on an Rx."Balance for appearance".

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    OptiBoard Novice waveboom's Avatar
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    I have questions about the balance lenses too:
    1. Can the balance lens use any diopter/power just its appearance/weight matches the other eye?
    2. how to define the eye need a balance lens?
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    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    1) Yes. It is cosmetic to match minification (Myope) or magnification (hyperope) of the eye and orbit behind the lens. I almost always will make it a spherical equivalent if the other eye is astigmatic. If I have any doubt I would ask the prescriber and/or read the power from the existing glasses.

    2) Maybe an OD will correct me if there are any exceptions, but I can't recall a time a Doc asked me to use a balance lens where there was any usable vision in that eye. In other words the patient is effectively blind in that eye.

    3) Welcome to Optiboard!

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    Ghost in the OptiMachine OptiBoard Silver Supporter Quince's Avatar
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    Another thing to note- when you are presented with a prescription indicating a balance lens, you always want to make sure you are fitting the patient with an impact resistant lens material, so as to protect their good eye.
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    OptiBoard Novice waveboom's Avatar
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    Thank you guys! Now I understood.

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    Master OptiBoarder AngeHamm's Avatar
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    Zombie thread!
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