Is reading small print bad for you?

Discussion in 'Optometry Archives' started by nyctransit10001, Nov 19, 2005.

  1. Is reading small print, in a dimly lit room for a long time actually
    "bad" for your eyes? I know it's not comfortable. I know it requires
    more effort. But in the long run, is this bad for your vision?
    nyctransit10001, Nov 19, 2005
    1. Advertisements

  2. nyctransit10001

    Neil Brooks Guest

    I'm not a doctor, but I have a pretty defined opinion on this: yes ...
    with caveats.

    Focusing (accommodation) utilizes your ciliary muscles. Chronic,
    habitual overtaxing of your ciliaries /can/ lead to ciliary
    hypertonicity--an excess of muscle tone in the focusing muscles. If
    this happens, you'll be pseudomyopic ("artificially nearsighted") and
    have significant trouble relaxing the accommodation, perhaps even
    requiring cycloplegic drops to achieve this (I know this via
    first-hand experience).

    In dim lighting, you also have a larger F-stop vis-a-vis dilation of
    your pupil, DEcreasing your depth of field and (I think) increasing
    reliance on the accommodative mechanism to clear a blurred image. You
    have more latitude with a constricted pupil and increased depth of

    Now ... that said ... is it a real issue, as a practical matter?
    Probably not, but why do it?
    Neil Brooks, Nov 19, 2005
    1. Advertisements

  3. nyctransit10001

    CatmanX Guest

    Basically, no. Problems with strain may occur, but you get over that.
    Contour interaction may make comprehension and reading speed slow, and
    if you go myopic, well that would happen with reading any print. Also
    the human eye operates over 5 log units of brightness, so dim light is
    not an issue either.

    Essentialy, no problems will occur that either wouldn't occur with any
    reading and any strain goes once you cease the task.

    dr grant
    CatmanX, Nov 19, 2005
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.