Is it ok to take my glasses on and off or best to leave them on?

Discussion in 'Glasses' started by newsbirdie2, Mar 12, 2005.

  1. newsbirdie2

    newsbirdie2 Guest

    I've noticed in the past few weeks that things have started getting
    just slightly blurry. It started with computer screens and then menus
    (at a distance), etc. So today I saw the eye doctor and got some
    glasses. The prescription is for:

    (+0.25) 50
    (-0.25) 50

    Two years ago I saw a different eye doctor but I didn't have insurance
    at the time so I didn't get the glasses. The prescription from two
    years ago was:

    +0.25 (+0.25 10 degrees)
    +0.25 (+0.25 170 degrees)

    Can anyone tell me if these are similar? I have tried the transposing
    algorithms but can't figure it out. I definitely see better with my
    glasses so I'm quite happy. Well text is clearer and not blurry, but
    it will take some getting used to.

    My next question is about taking them on and off during the day. The
    doctor told me not to do this, that if I put them on that I should
    leave them on. Unless I am going to be away from the computer for an
    hour or more I should leave them on. The doctor I saw two years ago
    told me the prescription she gave me was for glasses for reading and
    using the computer. I'm hoping I can use my glasses while using the
    computer and reading at my desk (the majority of the day, probably 6-7
    hours) and take them off the rest of the time (meetings, lunch, etc.).
    Would this be OK? Any general rules here?

    newsbirdie2, Mar 12, 2005
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  2. newsbirdie2

    newsbirdie2 Guest

    I just saw on the paperwork for my glasses that the company that made
    the glasses converted the prescription to the following:

    +0.00 (+0.25) 50
    -0.25 (+0.25) 140

    So now I'm really curious. The axis are similar to my old prescription
    from two years ago (50 compared to 10 and 140 compared to 170), but the
    first number is completely different. Could my eyes have changed in
    two years? I hate the thought of the possibility of having glasses
    that might not be the right correction.

    newsbirdie2, Mar 12, 2005
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  3. newsbirdie2

    myrnapap Guest

    I don't know about prescriptions and I think you need a professional to
    answer your questions about the correction. But I can give my opinion
    on your other questions. First, yes, it's possible that your eyes have
    changed in the last two years. Eyes are constantly changing as we age.
    This will happen whether or not you wear glasses. I don't believe that
    wearing glasses makes the eyes worse. As for wearing the glasses
    constantly, I think you should wear them when you need them. If you are
    comfortable taking them off at certain times, such as when you are not
    in front of the PC, then take them off. This will not hurt your eyes.
    The only thing that could happen is that you may forget where you left
    them and you could lose them. If you put them into a sturdy case, and
    keep the case with you or in a particular spot, then you won't have a

    If you are not feeling that the prescription you were given is correct
    for you, then ask the doctor. They should be willing to answer your
    questions. If not, find someone else.
    myrnapap, Mar 13, 2005
  4. newsbirdie2

    drfrank21 Guest

    You're talking about a very mild spectacle rx and it's not that much
    different than the original- to be honest I rarely even give an
    rx for that mild a refractive error. It's very common to have
    changes in two yrs. I'd just wear them part-time if it helps on the

    drfrank21, Mar 13, 2005
  5. newsbirdie2

    newsbirdie2 Guest

    Thank you for your reply. I know my glasses are very mild, and two
    years ago I didn't even get the prescription filled because I felt I
    saw well. But then when you try the glasses at the dr's office and can
    see perfectly it's strange to then go back to seeing things fuzzy. A
    follow-up question: If, in your opinion, I may not really need
    glasses, then will it hurt my eyes or make my vision worse to wear
    them? I've heard that if one wears glasses that the eyes stop working
    to compensate and become lazy. I'm not sure if that's true.

    If it's not bad for my eyes to take them on and off, I would like to
    leave them by my computer and wear them while using the computer and
    take them off when leaving my office (meetings, lunch, etc.). This way
    they'll always be by my computer and I won't lose them. I was just
    worried that might not be good for my eyes after the doctor said not to
    do that.

    Thanks again, it's great to get opinions from this group.
    newsbirdie2, Mar 13, 2005
  6. newsbirdie2

    g.gatti Guest

    g.gatti, Mar 13, 2005
  7. newsbirdie2

    otisbrown Guest

    Dear Michael,
    Subject: Wearing glasses.
    You will get two "opinions" about wearing a minus lens.
    (As you said -- to make your distant vision sharper.)

    Some MDs and ODs will attempt to avoid using a strong minus
    on a young child. If the child's vision passes the 20/40 line,
    they simply will not give the child a minus lens.

    Other ODs have called the minus lens "poision glasses for children".

    Other ODs will post "blasts" against the "second opinion" on this
    subject. For the record, one OD in posts a statement to that
    effect. Read,

    Medicine is the business of opinions. I would suggest use of
    that mild lens --- only when necessary. Dr. Dave Guyton
    (Johns Hopkins) says the same thing. Just be careful.

    I am an engineer -- to make your judgment accordingly.


    otisbrown, Mar 13, 2005
  8. newsbirdie2

    Dr Judy Guest

    Ahem, Otis

    This patient was prescribed plus lenses, not minus lenses

    Dr Judy
    Dr Judy, Mar 13, 2005
  9. newsbirdie2

    Dr Judy Guest

    There is no harm in taking glasses on and off, you will adapt faster if you
    wear them alot for the first week, after that it doesn't matter

    There is no truth to the idea that wearing glasses will make your eyes
    worse. The few people that think it does are referring to minus lenses for
    distance, not plus lenses for near which you have.

    Dr Judy
    Dr Judy, Mar 13, 2005
  10. newsbirdie2

    RM Guest

    No Otis, Medicine is a field where scientific reasoning is applied to the
    treatment of the human body. Medical therapies are proven in scientific
    studies, and then used to treat illness. If they are unsuccessful they are
    abandoned. If better therapies are demonstrated through scientific
    evaluation, they are adopted.

    You keep trying to twist definitions and quotes around to support your
    arguments. Is this what "engineering science" is all about?

    Your unproven approaches would be at best be termed "alternative medicine".
    Some might term them quackery.
    RM, Mar 13, 2005
  11. newsbirdie2

    otisbrown Guest

    Dear Michael,
    Subject: Slight prescription.
    As some ODs say -- they would not even bother giving you
    a "prescription", when you have variously
    a -0.25 and a +0.25. 1/4 diopter is the smallest
    "prescription" that and be given.

    People with 20/20 vision, can use a mild -1/4 to -1/2 diopter lens
    to "clear" to 20/15, and even 20/10. Most ODs will not do
    this because of the "risks" (i.e., eyes "adapt" to the minus lens).

    Again, you should be aware of these "contradictory" opinions,
    and decide these issues for yourself.

    If you complain of "eye strain" there are some ODs who
    will give you a "plus lens" for working at the computer.

    So, indeed, it is good to be aware of these opinions -- in
    the final anlysis, you decide this issue for yourself.


    otisbrown, Mar 14, 2005
  12. newsbirdie2

    newsbirdie2 Guest

    Hi Otis,

    When you say "a plus lens for working at the computer" are you
    referring to the first number or the second? When I look at my
    prescription, as transposed by the glasses company:

    +0.00 (+0.25) 50
    -0.25 (+0.25) 140

    I wonder if these are plus or negative?

    I used my glasses an entire day today and kept taking them off for a
    few seconds to compare. For text up close, there is barely a
    difference, it's just barely sharper with the glasses. But for objects
    farther away (for today I was in a training class and was reading text
    on a computer screen projected on the wall) I can definitely tell the
    difference, it is much sharper. And it also seems there is better
    depth perception but that could just be me. I think the glasses are
    more to correct the astigmatism than for near or farsightedness. Am I

    I'm very intrigued by this and I'm trying to learn as much as I can.
    I'm very grateful for the help I've received in this group.

    newsbirdie2, Mar 14, 2005
  13. newsbirdie2

    newsbirdie2 Guest

    Ok I've done a lot of Googling and I've read a lot. I'm learning a lot
    about optics and glasses. There is still a major point I do not
    understand. When I look at my original prescription, the spherical is

    (+0.25) 50
    (-0.25) 50

    I got it filled and on the paperwork is printed:

    +0.00 (+0.25) 50
    -0.25 (+0.25) 140

    I'm concerned about having the negative 0.25 as I've read negative lens
    can be bad. Also I'm not really concerned about seeing far away, it's
    more reading and computer work. When I read the way the prescription
    was written, the spherical is 0 and it's the cylinders that are +0.25
    and -0.25. But after transposing it looks like I have a minus lens.
    This is really confusing. Can you explain this?

    I don't really want the minus 0.25, I just want the astigmatism
    corrected. From the tranposing algorithms I understand that these two
    prescriptions are equal. So is it safe to have a "minus lens"?

    newsbirdie2, Mar 14, 2005
  14. newsbirdie2

    Neil Brooks Guest

    Gosh, I find Dave Guyton weighing in on this topic *only* on that
    ChinaMyopia site (1995), and *even there*, he's not agreeing with you,


    The closest he comes is to suggest that myopes should remove their
    minus glasses for reading or near work, or to slightly undercorrect
    the high myope.

    He only recommends plus (reading glasses) for myopes wearing *contact
    lenses* because the use of readers is easier than removing contacts to
    read. He also suggests that this may help reduce potential axial
    lengthening. But . . . in this case, you've neutralized the myopia
    via the contact lenses. You're just giving a plus lens to a virtual
    emmetrope at this point--not to a myope the way you advocate.

    David Guyton is a near-legend in strabismus ophthalmologist--and one
    whom I've met on several occasions. Where is it that you think he
    agrees with you??? I don't see it in what you're citing.
    Neil Brooks, Mar 14, 2005
  15. newsbirdie2

    drfrank21 Guest


    Basically, your srx is very, very mild. Transposed to minus cylinder,
    the right eye
    is +25-25x 140 (a smidgeon amount of hyperopia and astig) and the left
    is pl-25x050 (means a smidgeon amt of astigmatism only). Don't waste
    time being concerned or about the remarks of a couple of dim witted
    who have only their own agendas. You don't have ANY myopia or have a
    "minus lens",
    and, even if you did, it would do no harm .

    drfrank21, Mar 14, 2005
  16. newsbirdie2

    Dan Abel Guest

    It doesn't matter for the first one, since a minus zero and a plus zero
    are exactly the same. For your second, that is a minus. There is mainly
    only one person on this group who thinks that a minus lens is bad. Most
    everybody else says you should wear what you need (which is whatever makes
    your vision sharpest).

    Is a size 10 shoe good? It is if you have a size 10 foot. If you don't,
    then you shouldn't wear it. If the shoe fits, wear it.

    Dan Abel, Mar 14, 2005
  17. newsbirdie2

    otisbrown Guest

    Dear Michael,
    Subject: Very weak prescription
    If it were me -- I would not wear this
    "prescription". It is so weak that
    it is not worth it -- even though it
    SLIGHTLY sharpens your vision.

    Your prescription:

    +0.00 (+0.25) 50

    The 0.0 indicates "plano", or
    "plate glass. The second number
    is "astigmatism" -- which is very slight,
    not worth "correcting" in my opinion.

    -0.25 (+0.25) 140

    This is a minus lens of -1/4 diopters -- the
    smallest "prescription" possible.
    The second is 1/4 diopter astigmatism
    at 140 degrees (cylender). If you
    had another measurement -- this
    could change -- or "go away".
    Some ODs simply would not bother
    "prescribing" for this "astigmatism".

    The "standard practice" is to provide
    a lens that makes your vision as
    "sharp" as possible. This is what
    you have been offered, and what
    you paid for -- of course.

    If you wish to check some of this
    you might "download" and eye
    chart from

    and determine if you can read
    the 20/20 line. I suspect
    that you could read at least
    the 20/25 line.

    An alternative approach is to
    use a "reading" lens -- which
    you will find on a rack in a drug
    store. Some pilots have found
    that by using this plus lens to
    "relax" their "near vision", they
    can clear their "far" vision.
    But that issue does depend
    on your age and motivation.

    But again, if I were reading 20/25 or
    20/20 -- I simply would not wear
    the "slight" prescription.

    Just my opinion.


    otisbrown, Mar 15, 2005
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