Which Reading Glasses Should I Get?

Discussion in 'Glasses' started by midwest_46, Jan 5, 2007.

  1. midwest_46

    midwest_46 Guest

    This post is somewhat long, and I apologize for the inconvenience.

    I am a 33-year-old male. Prior to 1997, I wore glasses that were -4.25
    in the left eye and -4 in the right eye.

    In 1997, my eye doctor said that my eyesight was -5, -5. So, I started
    wearing -5, -5 glasses for driving, seeing movies in a theater, etc. I
    continued to use my -4.25, -4 glasses as reading glasses - for reading,
    computer use, etc.

    By 2004, the -5, -5 glasses were becoming too weak for driving. My eye
    doctor said that my eyesight was now -5.25, -5.25. So, I started
    wearing -5.25, -5.25 glasses for driving, and I continued to use the
    -4.25, -4 glasses for reading, computers, etc.

    For the theater, the -5.25, -5.25 glasses were too strong, and the
    -4.25, -4 glasses were too weak. So, for the theater, I used the -5, -5


    During the last few months of 2006, some weird stuff started happening
    to my eyesight. The -5.25 glasses started feeling inadequate when I
    drove, but these glasses did not produce a headache. I tried driving
    with the -5 glasses, and I could see a LITTLE less well with the -5
    glasses than I could with the -5.25 glasses. Also, the -5 glasses
    produced a headache. The headache made the -5 glasses feel STRONGER
    than the -5.25 glasses.

    Another weird thing that happened is that, on two occasions, the -5
    glasses were too strong when I used them to view a movie in a theater.
    I had to alternate between the -5 glasses and the -4.25, -4 glasses.

    In late 2006, I explained these weird things to my eye doctor, and he
    gave me an eye exam. He said that my eyesight is currently -5.125,
    -5.125. He said that my eyesight is fluctuating between -5 and -5.25.

    He said that, for driving, theater, etc., I could use either the -5, -5
    glasses or the -5.25, -5.25 glasses (my choice).

    For reading glasses, he said that I could use -4, -4 glasses or -4.25,
    -4.25 glasses (again, my choice).

    He said that .25 diopter wasn't much of a difference. However, he did
    recommend that I use the -4, -4 glasses for the reading glasses. He
    said that the -4.25, -4.25 glasses would be too much like a "crutch"
    for me.


    Here is the dilemma. The most recent eye exam showed that, with the
    -4.25, -4 glasses, I see well in the -4.25 (left) eye, and the image is
    somewhat blurry in the -4 (right) eye. Also, lately, I started noticing
    that, when I am wearing the -4.25, -4 glasses, I have been getting some
    strain or minor headaches in my right eye. So, perhaps that is because
    my right eye is struggling to see as well as my left eye is seeing.

    So, while I don't want to use -4.25, -4.25 glasses as a crutch, I also
    don't want to wear glasses that are so weak (-4, -4) that I have to
    struggle to see. I have read that BOTH, using glasses as a crutch AND
    struggling to see, are bad for your eyesight.

    So, which prescription do I get? -4.25, -4.25? Or -4, -4?


    Also, if the -5 glasses are producing a headache, and the -5.25 glasses
    are not producing a headache, does that mean that I have "gotten used
    to" the -5.25 glasses? Are the -5.25 glasses my "crutch"?

    Thanks for any information, and I apologize for the long post.
    midwest_46, Jan 5, 2007
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  2. i don't think the -525 are a "crutch". If your correction is -5.25
    according to your doctor than these are what you need to wear. Do you
    have accommodative insufficiency? Why does a 33 year need reading
    glasses? why the need to switch glasses all the time? perhaps there is
    a reason (ask your doc) but otherwise you should be wearing your -525
    most of, if not all of, the time. Constantly switching pairs may be
    part of the problem. IMHO.
    michael toulch, Jan 5, 2007
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  3. midwest_46

    Dr. Leukoma Guest

    Just from what you have indicated here, your prescription seems to be
    less in a dark room? What prescription works best when driving at
    night? You may have a situation in which the prescription changes as a
    function of your pupil diameter. You may also want to have a
    cycloplegic refraction (with dilating drops) to see if there is
    something funny going on with your accommodation.

    Dr. Leukoma, Jan 5, 2007
  4. midwest_46

    Dan Abel Guest

    I can't imagine that there is a significant difference. I find that
    when I'm not seeing well while reading, I just move the book up or down
    my lap until vision is better. When using a computer, move your chair a
    few inches. At the theater, see whether sitting in front or in back

    To translate what Dr G posted, perhaps you need to use a more powerful
    Dan Abel, Jan 5, 2007
  5. midwest_46

    midwest_46 Guest

    I use the -5 and the -5.25 glasses for driving, watching movies, and
    other "long-distance" activities. I use the -4.25, -4 glasses for "up
    close" activities like reading a newspaper, using a computer, etc. If I
    used the -5.25 or the -5 glasses for reading a paper or using the
    computer, I would get major headaches, and I would probably suffer a
    decrease in my eyesight.

    Actually, I recently went to LensCrafters, and I found out something
    interesting. My -5.25 glasses have plastic lenses, but the -5 glasses
    have polycarbonate lenses. According to LensCrafters, once I got used
    to the plastic lenses, wearing the polycarbonate lenses started causing
    discomfort. I used the -5.25 lenses (for driving) much more often than
    I used the -5 lenses (for watching movies). So, the difference in lens
    material may be the answer to the question of why the weaker -5 glasses
    were causing a bigger strain than the stronger -5.25 glasses.
    midwest_46, Jan 7, 2007
  6. midwest_46

    midwest_46 Guest

    use a flat-screen computer monitor. I had used flat screens before, but
    this monitor seemed defective. I used my -4.25, -4 glasses in the
    workplace. This monitor seemed to have a blurry image, and I felt that
    I was straining my eyes to see the image. It was during this period
    that I started feeling that my -5.25 glasses were inadequate for

    In particular, I noticed that I was having some trouble driving at
    night. So, I started using my high-beam head lights. I explained all of
    this to my doctor.

    When you say that my prescription seems less in a dark room, are you
    saying that my eyesight should be better in a darkroom? A lesser
    prescription = fewer diopters?

    During my last few visits with my eye doctor, he dilated my eyes to
    test me for glaucoma. All tests showed that everything was good.
    midwest_46, Jan 7, 2007
  7. midwest_46

    Mark A Guest

    There are several types of plastic material:

    1.50 regular plastic (CR-39)
    1.53 Trivex
    1.54 Spectralite (Sola/AO only)
    1.59 Polycarb (a type of plastic)
    1.60 Plastic
    1.67 Plastic
    1.71 Plastic
    1.74 Plastic
    and a few others

    Polycarb (like Trivex) has very high impact resistance and high tensile
    strength. But it has the horrible optical properties (primarily measured by
    abbe value). Trivex has very good optical qualities, but is a bit thicker
    (lower index) for a given Rx.

    I will give you one piece of advice. If you know exactly what you are
    getting from Lenscrafters, and you are happy with it, then fine. But don't
    ever believe the BS they tell you. Even when they are not lying, the sales
    people rarely know what they are talking about.
    Mark A, Jan 7, 2007
  8. midwest_46

    Lynne Guest

    Would uveitis cause this type of problem? I ask because I have a similar
    problem to the OP, but my vision seems to fluctuate with changes in the
    health of my eyes. I have uveitis and have been using Lotemax for 2 years
    now (low daily dose at this point, and for the long term). On days when I
    am having increased pain, redness and dryness, my vision is very blurry.
    Even on good days, I know I need new glasses again.

    I dread the ordeal because it's so difficult to get the prescription right.
    Does dilation help reduce problems determining the best prescription? I
    usually go to my opthamologist for my eye test, but for now just want to
    get a quickie eye exam from the optometrist at the eyeglass place since my
    next opthamology appointment is 6 months out.
    Lynne, Jan 17, 2007
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