Short and long sight

Discussion in 'Optometry Archives' started by Glen, May 15, 2011.

  1. Glen

    Glen Guest

    My wife is 42. She had short sight from school times & wears
    contacts (power is around -3 & -4). For the last couple of years
    she has developed long sight which happens only when she is
    wearing her contacts.
    When she isn't wearing contacts, she can read books fine. But when
    she wears he contacts, she needs reading glasses for reading books.
    Is this common?
     
    Glen, May 15, 2011
    #1
  2. Glen

    Otis Guest

    Very common.
     
    Otis, May 15, 2011
    #2
  3. Glen

    Neil Brooks Guest

    A bit of light reading for the two of you....

    http://en.wikipedia.org/wiki/Presbyopia

    She should probably get her eyes checked, just to rule out any other
    possible cause, but ... the timing's right.
     
    Neil Brooks, May 15, 2011
    #3
  4. Glen

    Dan Abel Guest

    Very common. If I remember correctly, about half of all people develop
    this in their mid-forties. The rest get it later. It's part of the
    aging process. I wore reading glasses over contacts for many years.
     
    Dan Abel, May 15, 2011
    #4
  5. Glen

    Glen Guest

    I get that. My question is - why does she need reading glasses only
    when she is wearing contact lens? Why doesn't she need reading glasses
    when she isn't wearing contact lenses?
    Defense against what?
    Could you elaborate?

    I also am short sighted. I have a power of 0.75 in both my eyes.
    I wear glasses for driving & watching TV/Movies.
    I also feel I may need reading glasses very soon. My fine print
    reading has deteriorated just a bit - I can reads books & newspapers
    just fine, but very fine print has started getting a little bit
    difficult. I am also around the same age as her.
    She visited the optician (not doctor) and got reading glasses. When she
    is at home & not wearing contact lenses, she doesn't need these at all.
    Only when she is out wearing contacts, she carries these in her purse
    if needs to read something.
    What's that?
    Ok. We will visit the eye doctor soon.
     
    Glen, May 15, 2011
    #5
  6. It's not unusual. The accommodative requirements of a spectacle-corrected myope
    are less than a CL-corrected myope, or an emmetrope, and is explained by the
    effect spectacle lenses have on the vergence of light rays from a near object.
    Spectacle-corrected myopes converge less at near also, due to the base in prism
    induced as the eyes converge behind a minus lens.

    Robert Martellaro
    ~~~~~~~~~~~~~~~~~~
    Roberts Optical Ltd.
    Wauwatosa Wi.
    www.roberts-optical.com
    ~~~~~~~~~~~~~~~~~~
    "Science is a way of trying not to fool yourself."
    - Richard Feynman
     
    Robert Martellaro, May 18, 2011
    #6
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