Wrong Prescription? Contact Lens.

Discussion in 'Contact Lenses' started by JZ27, Feb 1, 2005.

  1. JZ27

    JZ27 Guest

    My old prescription:

    L: -4.5
    R: -4.75

    I went to the optometrist today and he gave me a new prescription:

    L: -4.25
    R: -4.25

    He gave me the first prescription a few years ago. Is it normal to have
    my vision improve like that? Or was he that off on the original? I had
    no problem with the stronger prescription. I have a trial pair of
    contacts in now with the -4.25 and feel a slight headache - it's been
    about 4 hours with them in. The trial pair have a slightly bigger BC
    and Diameter (O2Optix)than my previous contacts as well (Optima FW).
    Should I go back for him to recheck? Any thoughts would be appreciated.
    Thank you.
    JZ27, Feb 1, 2005
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  2. JZ27

    retinula Guest

    Yes, it is possible that your prescription has changed by that amount.
    In addition, your new contact lens brand is very different from the
    original brand you wore (it is made with a superior type of plastic).

    Give your new trial about a week to adjust to. It is very common for
    someone to have difficulty adjusting to a prescription where the minus
    power has been decreased even if they need it.
    retinula, Feb 1, 2005
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  3. JZ27

    LarryDoc Guest

    So your prescription changed, the last one being "a few years ago."
    Well, that happens. It's one of the reasons I have a job.

    You certainly should go back for a re-check. If you were given a "trial
    pair", that's what that means. You MUST return for follow-up in order to
    finalize your prescription prior to ordering lenses. I would assume you
    were told this.

    Second point: The new lens is a different design than the former and the
    effective power is not necessarily equal. .25 or .50 difference is
    certainly possible.

    Third point: O2Optix has more than 10 times the oxygen permeability than
    the Optima. This might allow a reversal of cornea compression/swelling
    and that can easily relate to a .5 difference in power.

    Don't be surprised if your Rx changes yet again---in either direction.

    --LB, O.D.
    LarryDoc, Feb 1, 2005
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