Color Vision through IOL

Discussion in 'Eye-Care' started by Ms.Brainy, Jul 16, 2007.

  1. Ms.Brainy

    Ms.Brainy Guest

    As some of you know, I recently had a cataract surgery in my right
    eye, with a new IOL implant. The cataract developed after a macular
    hole surgery (vitrectomy and 2-month gas bubble), followed by a
    retinal detachment shortly thereafter (another vitrectomy, laser,
    cryotherapy, scleral buckle and another 2-month gas bubble).

    Both surgeries were successful, but resulted in a pucker right above
    the macula, and a very thick cataract (stage 3), impairing my vision.
    My myopia also was increased by about 3.5D in the affected eye.

    My good left eye has stage 1 cataract with no significant impact on my
    vision.

    My vision after the cat removal and the IOL was improved
    significantly, but will not be correctable to 20/20 due to the retinal
    damage.

    I have read a lot about the brightness of colors following cat
    surgery, however my experience is somewhat different, given my
    opportunity to compare side-by-side color vision through stage 1
    cataract against clear new IOL.

    The no-cat white is whiter. The no-cat sky is bluer. Some othe light
    colors are somewhat brighter (as if they were mixed with white). But
    all other colors are more intense through my other eye -- the yellow
    is yellower, the green is greener, the red is redder, and even the
    darker blue is bluer through my stage 1 cataract. In addition, my
    night vision in the no-cat eye is quite poor.

    How could it be? One explanation I have is that I might have lost a
    substantial amount of cones due to macular damage. Does it make
    sense? Could it be?

    BTW, my color vision in both eyes combined is somewhat in the middle
    and I get both the brightness and the intensity.
     
    Ms.Brainy, Jul 16, 2007
    #1
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  2. it could be loss of cones, but I doubt it. Instead, I think that you
    are getting so much more light into the iol eye than the other, that you
    are being dazzled into thinking the colors are less vivid. You might try
    getting a neutral grey filter that "tones down" the iol eye to roughly
    the same brightness perception as the other, then compare those colors.

    w.stacy, o.d.
     
    William Stacy, Jul 17, 2007
    #2
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  3. Ms.Brainy

    Guest Guest

    You now have better contrast sensitivity in that eye now that there is
    no cataract to scatter the light about.
     
    Guest, Jul 17, 2007
    #3
  4. Ms.Brainy

    Jane Guest

    The best source for an explanation about this would be your retinal
    specialist. I can offer a couple of possibilities, for what they're
    worth. The pucker (actually a layer of scar tissue) you developed
    could be affecting your perception of colors. So could the blue-light
    filtration feature of your AcrySof IQ lens. When Alcon introduced
    this feature a few years ago, critics (mostly from rival lens
    manufacturers such as AMO) claimed that it would cause a distortion in
    color perception. Alcon did conduct tests (but only on people with
    healthy retinas) and reportedly found that their blue-filtration
    lenses did not affect color perception. However, I've read online
    reports from people who claim otherwise. Personally, I've found that
    my perception of colors in the blue-violet range is different in each
    of my eyes (both of which have AcrySof IQ lenses). I suspect that
    this may be the result of the blue-filtration feature in an eye with a
    less than perfect retina. I wrote to Alcon about it, but they weren't
    very interested.
     
    Jane, Jul 17, 2007
    #4
  5. Ms.Brainy

    DoctorRick Guest

    I don't think anyone can give you a definite answer, but I believe
    your guess is the most likely cause-- i.e. you have damage to the
    cone-rich macular region in your surgical eye thereby causing
    diminished color vision. The fact that the eye also had cataract
    surgery is not the important point. It's that the macula was damaged.

    Color changes that occur following cataract surgery are most prominent
    when the cause of the cataract is nuclear sclerosis (i.e. yellowing).
    Profound yellowing filters out the short wavelength (blue) end of the
    visible spectrum so that many patients report that blue objects (e.g.
    the sky) seem more enriched following surgery. Cataracts caused by
    posterior subcapsular changes, which was probably the type of cataract
    you had, are not accompanied by yellowing so color changes are less
    common.

    Of course all this is conjecture, but I think its quite reasonable
    conjecture.
     
    DoctorRick, Jul 18, 2007
    #5
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