Dr. Mercola February 09 2006 1,085 views
You can take a quick on-line color vision test consisting of four cards from the popular "Color Vision Testing Made Easy".
Try and find a circle, star, or square first two cards, and a dog, boat, balloon or car on the third.
Because you know how much I like optical illusions to test your vision, I thought you'd get a kick out of trying this free color vision test devised by Bernell Corp.
Unfortunately if you are color blind there is not much that I am aware of that can reverse this problem as it seems to be an inherited condition from birth.
By the way, if you're a man who has taken a sexual dysfunction drug like Viagra at some point, it may be well worth your time to take the test, considering short-term, blue-green color blindness is one of its common side effects.