Switching eyes for monovision.

Discussion in 'Eye-Care' started by TomMonger, Jan 18, 2006.

  1. TomMonger

    TomMonger Guest

    I am a 42 y/o male with very mild myopia and a slight astigmatism in my
    left eye. (Yet I can see well from 2 feet to 5 feet pretty clear
    without correction).

    My progressive lens eyeglass prescription is:

    OD: -.75 DS 1.25
    OS: -.50 .50 170 1.25

    I decided to start wearing contacts again, and my OD said that because
    I have such a weak prescription, monovision would probably work well
    for me. So, I decided on Acuvue 2 (the Acuvue Advance hurt my eyes)...
    and I'm wearing a -.75 in my right eye (supposedly my dominant eye) and
    a +.50 in my left. I'm having no problems adapting, even at night. I
    also have -.50 lenses for my left eye in case I want both eyes set for
    distance correction.

    My question to the pros here is: When I don't wear vision correction
    (which is often), my right eye is fairly blurred at a distance and my
    left eye sees pretty well. Close up is the opposite; my right eye sees
    well, but my left eye is blurred (unless I move whatever I'm looking at
    further away). My OD has my right eye corrected for distance, although
    I am used to my LEFT eye seeing more clearly for distance. I guess I've
    been doing a sort of monovision when I'm not wearing glasses or
    contacts. Would it be bad if I switched my lenses and just enhanced my
    current vision, making my left eye better for distance and my right eye
    better for close up?

    The reason I ask is that I have heard that correcting the NON-dominant
    eye for close-up can cause problems.

    -Tom in Scranton, PA USA
    TomMonger, Jan 18, 2006
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  2. TomMonger

    LarryDoc Guest

    Most people, but not all, will have one eye which is dominant for both
    distance and near vision. That being the case, the dominant eye is
    corrected for distance and non-dominant for near. You can be tested for
    dominance and, of course, you could try the lens correction for
    optimized distance for each eye separately and see which one "feels" the
    best for you.

    Another option is to try an aspheric lens (such as O2Optix or Focus
    Night&Day (silicone), one of the HEMMA soft lenses or RGP lenses
    available as aspheric). Oftentimes aspheric lenses provide +.75 to even
    +1.25 add power and that might be all you need for excellent distance
    and near vision. Sometimes using this technique with a little
    under-correction of one eye is the best answer.

    LB, O.D.
    LarryDoc, Jan 18, 2006
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  3. TomMonger

    TomMonger Guest

    Thank you for the very prompt reply, Larry.

    I tried AV Advanced silicone lenses and they were extremely
    uncomfortable. Made my eyes "sting" and were blurry after a few hours.
    For this reason, I'm hesitant in asking my doctor to try other silicone
    lens designs (like O2's or N&D's). But I'm willing to try anything at
    lest once:)

    When you mentioned aspheric lenses, how would they be worn? I'm not
    sure I understand what you mean by the +.75 to +1.25 add powers? When
    I wear lenses (or glasses) corrected for distance only (OD: -.75 and
    OS: -.50), I can't see close up at all.

    As for RGP lenses, I tried them last year. I couldn't keep them on my
    eyes more than 2 minutes. My doctor tried a different type, and I
    encountered the same thing. I'd put them in and they hurt so bad, I'd
    have to pop them out immediately. AV2 seems to be the most comfortable
    lenses I've ever had.

    And lastly, what do you mean by "under-correction"? Does this mean
    wearing a -.50 instead of a -.75?

    Thanks again,
    Tom in Scranton, PA USA
    TomMonger, Jan 18, 2006
  4. TomMonger

    LarryDoc Guest

    The other silicone lenses are not all that similar to AV Advance which,
    IMHO, is inferior to the others, including the newest AV lens called
    Oasys. The Oasys is a great lens, one of my favorites, but does not have
    aspheric optics.
    They are used just like any other lens. The plus powers indicate the
    add powers---how much ADDitional plus (or less minus) power you need for
    near vision.
    The AV Oasys lens is built on the same mold as AV2, so it should be as
    comfortable or better, and certainly healthier. But again, not aspheric,
    so you would have to go with monovision or use plus 1.25 readers over
    them, a very reasonable alternative.
    Exactly! You can under-correct to skew the power for better near
    vision. In theory, the aspheric optics will provide some "automatic"
    plus add power so that you will need no, or at least less
    under-correction. The only way to tell what will work best for YOU is to
    try it!
    LarryDoc, Jan 19, 2006
  5. TomMonger

    TomMonger Guest

    Got it.

    Thanks for this info!

    -Tom in Scranton, PA USA
    TomMonger, Jan 19, 2006
  6. TomMonger

    TomMonger Guest

    The other silicone lenses are not all that similar to AV Advance which,
    I was reading up a bit on aspheric lenses. The way I understand it,
    since they flatten out from center to edge, this creates an almost
    multifocal effect? So if I tried aspheric-type lenses, I would go with
    a minus in both eyes, possibly undercorrecting one eye?
    I don't mind that. I've done that for 2 years with my previous
    I know that ANY minus lens in either eye, whether a -.50 or -.75
    results in worse close-up vision. So I'm not so sure undercorrection
    would help. Then again, maybe it will with aspheics??

    Thanks again for your input!
    -Tom in Scranton, PA USA
    TomMonger, Jan 19, 2006
  7. TomMonger

    TomMonger Guest

    Mike Tyner wrote:\
    You DO have a point there!

    TomMonger, Jan 20, 2006
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