Anything New (Lenses, etc.) Avail. These Days For Colorblindness ?

Discussion in 'Optometry Archives' started by Robert11, Dec 29, 2003.

  1. Robert11

    Robert11 Guest

    Hi,

    Asked this question about a year or two ago, and thought
    it might be a good time to see if anything new is available for my son.

    He has color blindness, (red and green discrimination problems).

    Was wondering if there are any new lenses, etc. that are now available.

    I know there used to ba an outfit that offered a red tinted lens, but i
    haven't
    heard anything re them in quite a while, and it didn't get very good
    reviews.

    There was alksn a Colormax Corp outfit, who I haven't heard anything about
    for a few years. Their lenses were extremely expensive, too much to even
    consider
    for us.

    Anything new available ?

    Thanks,
    Bob
     
    Robert11, Dec 29, 2003
    #1
    1. Advertisements

  2. I am not a vision professional. This response is that of a physicist.

    Color blindness is a hereditary disease. In effect, you are missing one or
    more of the three fundamental kinds of cones that are the receptors. It is
    also possible that there are abnormal cones that have aberrant spectral
    characteristics. In any event, I would be very surprised if there is a
    therapy to rectify cone defects.

    That said, it should be possible to use filters to enhance discrimination
    between two colors as long as they have different spectral distributions.
    This assumes that you have two functional sets of cones. In the rare cases
    of having only one set of functional cones, all filters will do is to change
    the sensitivity of what effectively is black and white vision as the color
    changes. If you have no cones, photopsia, color vision is the least of your
    problems.

    By using filters, you willbe able to change the ratio of excitation of your
    two sets of cones. That will enhance the ability to distinguish between to
    colors. What will also happen is that the ability to distinguish between
    certain different pairs of colors will be lost.

    Even for people with normal color vision, that can happen. If it were not
    for the ability to match colors by mixing various amounts of them, color
    photography and printing would be impossible. Thus the red, green, and, blue
    light can be combined to give a wide range of apparent color. That is, two
    different spectral distributions can be perceived to be the same color.

    Bill
     
    Repeating Rifle, Dec 29, 2003
    #2
    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.