How is light focused and detected by our eyes, and how does this information perceived as images?

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Dec 10, 2017

Answer:

Light is directed by the eyes in much the same way as glass lenses.
Light is interpreted by the brain in much the same way as digital information.

Explanation:

The corinea first bends the light using the principles of refraction.
Then the light enters the lens. the muscles can stretch the lens so it bends the light more slowly to focus on objects further away. The muscles can also contract the lens making it thicker so that the image of objects that are closer can be focused on the retina.

When the light hits the retina it strikes multiple cells, both cones and rods. Each of these cells function like a a picutal like in a computer. The brain takes these multiple pieces and puts them together to form a picture. Interesting the picture formed is upside down in the retina. The brain must turn the upside down picture right side up.

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SCooke Share
Dec 10, 2017

Answer:

Light is focused by the lens, detected by the retina, and interpreted by the brain.

Explanation:

The eye lens is a flexible tissue that can be adjusted within certain limits to focus incoming light onto the receptors (rods - black and white, and cones - color) of the retina.

The retina sends these signals to the brain, which interprets them into our knowledge of "images" from experience or learning processes. HOW the brain exactly stores, retrieves and makes sense of sensory data is not really understood at this time. We know which parts of the brain are more involved in some process than others, but not how the observed physiological process relate to how we "know" things.

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