Eyes are the organs of vision. Through a complex process, they detect and focus light to create images. Vision begins when light rays are reflected off of an object and enters the eye through the cornea and then pupil. It then passes through the crystalline lens which refracts light to be focused on the retina. By changing shape, the lens functions to change the focal distance of the eye so it can focus on objects at various distances.
When light hits the retina, tiny cells, rods, and cones capture the light signals and convert them into electrochemical impulses in neurons. Working together, these cells process the light to create an image by triggering nerve impulses that pass to the image centers in the brain via the optic nerve:
Communicate the object’s shape by reading black and white and shades of gray.
Communicate the color of the object.
It’s important to understand how the eye works so you can understand your body. The better informed we are about our health, the easier it is to note potential symptoms and to take an active role in preventative care.
If you have any questions about your vision or eye health, contact us right away. We are happy to have an eye care professional explain any of these concepts or evaluate your eye health.
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James W. Webb, O.D.
Eyemart Express in the Hoover Grove
Heather M. Webb, OD
Alabaster Walmart Vision Center