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Thread: Another PAL adapt question......

  1. #1
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    Wave Another PAL adapt question......

    I have a 71 year old lady, status PCE that is having some trouble with her new lenses. She states her vision is great, nice and crisp at every focal point as long as she is stationary. Once she gets up and moves around she notes getting dizzy. She has worn PALS for years with no complaints and has a very easy-going personality. She states it doesn't get any better with wear.

    Most recent glasses prior to CE were:
    -4.50 -0.25 x 30 PD30 +2.50 ADD
    -6.00 sph PD30 +2.50 ADD
    Hoya Summit ECP 1.7 (2BC), Seg 19
    49/19 Silhouette Rimless

    PCE glasses:
    -2.00 sph PD30 +2.75 ADD
    -2.25 sph PD30 +2.75 ADD
    TruClear Digital, Trivex (3.48 BC), Seg 18
    50/17 Silhouette Rimless

    My question is could the lens material or BC be what's causing this? She has worn several different lens designs in the past and alternated between 1.67 and 1.7 with no issues or remakes. Doc did an RX reck today and even checked the fit and adjustment of the glasses. He also noted she moved through all focal points with ease and clarity. Doc thinks it may be the Trivex, I'm leaning more towards the BC but want to make sure I'm not missing something.

    TIA

  2. #2
    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    Quote Originally Posted by GAgirl View Post
    I have a 71 year old lady, status PCE that is having some trouble with her new lenses. She states her vision is great, nice and crisp at every focal point as long as she is stationary. Once she gets up and moves around she notes getting dizzy. She has worn PALS for years with no complaints and has a very easy-going personality. She states it doesn't get any better with wear.

    Most recent glasses prior to CE were:
    -4.50 -0.25 x 30 PD30 +2.50 ADD
    -6.00 sph PD30 +2.50 ADD
    Hoya Summit ECP 1.7 (2BC), Seg 19
    49/19 Silhouette Rimless

    PCE glasses:
    -2.00 sph PD30 +2.75 ADD
    -2.25 sph PD30 +2.75 ADD
    TruClear Digital, Trivex (3.48 BC), Seg 18
    50/17 Silhouette Rimless

    My question is could the lens material or BC be what's causing this? She has worn several different lens designs in the past and alternated between 1.67 and 1.7 with no issues or remakes. Doc did an RX reck today and even checked the fit and adjustment of the glasses. He also noted she moved through all focal points with ease and clarity. Doc thinks it may be the Trivex, I'm leaning more towards the BC but want to make sure I'm not missing something.

    TIA
    I'll bet it's the reduced minus so no lens change will work- only time.

    In a similar shaped different frame edge a pair of sv distance, same base curve if possible cr39 or poly and see what she sees before going into more progressive re-do's.

    Move the oc's as you would a progressive.

    Let's wait and see what Mr Martellaro says.
    Last edited by Uncle Fester; 08-09-2019 at 09:24 AM.

  3. #3
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    It clearly is the reduced minus. She is now looking through increased plus and therefore increased magnification, with the visual effects that brings, throughout her new lenses.

    Wearing progressives post cataract surgery is just like wearing progressives for the first time, as she essentially has 'new eyes'.

    What she doesn't have is a new brain and therefore there will be an adaptation period possibly approaching several weeks.

    She could get used to sv distance first before going back into progressives.

    A dual surface lens design such as camber or Hoya's mystyle lens will be easier to adapt to, as they tend to produce less swim effect.

  4. #4
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    I can't believe anyone could consider this to be due to the lens material. What was his scientific explanation for how the material could cause dizziness?

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    Quote Originally Posted by Robert_S View Post
    I can't believe anyone could consider this to be due to the lens material. What was his scientific explanation for how the material could cause dizziness?
    because it's always the labs fault and something is wrong with the lens not the prescribing rx or the fit. /s

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    I would maybe try her in some finished sv cr39 lenses real quick to see if she still feels that way in some junk frame I had laying around

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    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    From the late great guru Darryl Meister as to possible increased Base Curve cause post #4:

    https://www.optiboard.com/forums/sho...ion+due+change

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    Eyes eastward... Uilleann's Avatar
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    Did the doc trial frame pt as well, and have her walk around the practice, go outside, etc, to see if the problem persists?

  9. #9
    One eye sees, the other feels. OptiBoard Gold Supporter
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    Tia,

    Check medical history. If it happens w/o eyeglasses see a GP or ENT doc. Otherwise PAL design, probably too hard/fast/strong. Will probably do some or most extended close tasks w/o eyeglasses.

    Hope this helps,

    Robert Martellaro
    Roberts Optical Ltd.
    Wauwatosa Wi.
    www.roberts-optical.com
    ~~~~~~~~~~~~~~~~~~
    Science is a way of trying not to fool yourself. - Richard P. Feynman

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    Thanks everyone, I really appreciate all the input!

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