Dichromatic vision is colorblindness. Normal color vision is known as trichomacy, which means that the eye uses all three types of light cones normally. Dichromatic vision means that people can only use two types of cones. There are different types, depending on which cone does not work.
colour blindness
Dichromatic vision is the ability for an animal to distinguish colors in dim light. It is the evolution of the basal mode of vision in animals.
Horses have a limited colour range in vision. They have dichromatic vision, meaning they see the world in many shades of greys, browns, and yellows.
red and green
Dogs have binocular vision over about 80 degrees of their visual field, which is enough for good quality binocular vision. This does vary some by breed, with collies probably having a smaller area of binocular vision than a golden retriever due to the placement of the eyes and length of the nose. Dogs have dichromatic vision, meaning they see in only two colors. Read more: Vision - How dogs see
Colorful, multihued, dichromatic (weak)
Guinea pigs are dichromatic. They see colors as a human with color blindness would, certain colors would be hard to perceive and contrast
What would you suffer from if you had myopia
It's hard to say. Cows have dichromatic vision (can only see in blues and yellows), but do not have binocular vision like predators such as humans and lions do, and cannot really judge distance as well. They can, however, see almost behind their heads because their eyes are on the side of their head (like all prey animals).
Cats have vision identical to a red-green colorblind human, they have no red cones meaning the colors red, yellow, and green are indistinguishable. They only have blue cones and green cones and thus can only see colors that can be distinguished via them. All mammals except primates (humans are primates) have this same limited dichromatic vision.
If your saying vision as in sight. Then you would say.. I have really bad vision. Or if your saying it as a dream that shows you the future. it would be.. I just had a vision.
Guinea pigs are known to have dichromatic color vision. This means that guinea pigs can see every color, but red.