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Summary: The eye sees color through the retina's rods and cones, which receive and respond to different wavelengths that cause a stimulation. Find out how the brain processes this information after it is sent through the optic nerve with help from an optometrist in this free video on optical astigmatisms.
"Hi, I'm Dr. Raj Patel from Vancouver Vision Clinic here in Vancouver, Washington and we're going to talk a little bit about how the eye sees color. And so in order to get started, let's kind of review some of the basics of the eye. So, first of all, in order to see color, we have to understand where the retina is and so the retina is this back part of the eye. It's kind of the landing pad where all the light, all the wave lengths of light that enters your eye through here, they land back here in the back of the eye called the retina. And so the retina is comprised of two different types of cells called neuroreceptors. And they're called rods and cones. When we talk about color vision, we're really more interested in cones. There's actually three types of cones and each cone is responsible for reception of different wave lengths and they respond differently in different wave lengths. So is in essence, whenever we see color, what happens is that when light enters into the eye, and lands there in the back of the eye into the retina, that white light or whatever wave length of light we're talking about, whether it's blue or green or yellow, lands in the back of the eye and it stimulates these different cones. And so the cones are stimulated to different degrees depending on what wave length of light entered into the back of the eye. That information then that's generated into the cones is sent into the back of, in in in into the brain via the optic nerve. The brain then takes that information and processes all that comparative data between the different cones and then the brain sort of figures out from all that comparative data the sum of all that information and essentially figures out what wave length of light must've landed in the back of the eye to stimulate that specific combined response in the cones. And that is in essence is how we see color."
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