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15 Cards in this Set
- Front
- Back
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RETINA |
Area at the back of the eye packed with light sensitive photoreceptors where light is transformed from waves to electromagnetic stimuli that your brain can process and understand. |
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PHOTORECEPTORS |
Proteins that are able to create a biochemical reaction within the eye when light is recieved to create electromagnetic stimuli. Also known as rods and cones. |
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MACULA |
A section in the back of the eye rich in photoreceptors which give more color and detail. Outer layer of the fovea |
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TAPETUM |
A network of bloodvessels that nourish the retina. Responsible for our detailed view. In humans this is black, which absorbs all light possible coming in which gives us high detialed images. In cats and cows the tapetum is colored and shiny which reflects light back out of the eye a second time, allowing for a fuzzy yet night vision image. |
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SCLERA |
Thick,fibrous cell coat that allows extra protection and an attachment point for certain muscles so you can look to the left without turning your head. Also allows structure for the shape of the eye. |
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OPTIC NERVE |
Bundle of nerve fibers that send electromagnetic messages from the retina to the brain allowing you to process images. |
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BLIND SPOT |
The area where the optic nerve exits the retina to the brain. There are no light sensitive cells living in this area so no light is absorbed. |
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CORNEA |
Transparent dome shaped window covering the front of the eye. Powerful refracting and focusing power. |
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FOVEA |
Area at the back of the eye were light is focused the most. Packed with photoreceptors and cones, images get sent to your brain in the best quality possible. Converts sharpest images. |
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Aqueous and vitreous humor |
Clear, gelatin like substance that fills the cavities in the eye to allow structure and nourishment to the tissue. |
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Anterior and posterior chambers |
Cavities surrounding the iris,cornea and lens which are filled with aqueous and vitreous humor to allow structure and nourishment |
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PUPIL |
Opening in the eye which allows light into it. Iris muscle contraction this area to focus amount of light coming through. |
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IRIS |
A tight network of blood vessels and muscles which constrict and relax to help change the shape or dilation of the pupil allowing certain amounts of light in. Pigment cells determine color. |
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LENS |
Helps focus an image to the back of the iris, magnifying and reflecting the image so it can be perceived by the brain. Able to change its shape with the pupil. |
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Ciliary body |
Ciliary muscles which are connected to suspensory ligaments or tiny muscles around the lens to help in the process of the iris changing the shape of the pupil to focus light. |
