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Definition
| The transparent "window" to the eyeball; has a rich supply of transparent sensory nerve endings |
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Term
| Why is the cornea transparent? |
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Definition
| Because it is made up of a highly ordered arrangement of fibers and contains no blood vessels or blood (which would absorb light). |
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Definition
| the watery fluid in the anterior chamber of the eye; fills the space right behind the cornea; the fluid is derived from blood; supplies oxygen/nutrients to and removes waste from the cornea and the lens |
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Term
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Definition
| (AKA: lens) the lens inside the eye that enables changing focus; has no blood supply; completely transparent; its shape is controlled by the ciliary muscle; light must pass through the pupil to get to the lens |
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Definition
| where light enters the eye; simply a hole in the muscular tissue that is the iris; controls the amount of light that reaches the retina via the pupillary light reflex |
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Definition
| automatic response - when the level of light increases or decreases, the iris automatically expands and contracts to allow more or less light into the eye |
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Definition
| the transparent fluid that fills the vitreous chamber in the posterior part of the eye; gel-like and viscous; generally transparent; located behind the lens; the vitreous chamber comprises 80% of the internal volume of the eye |
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Term
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Definition
| bits of biodebris that drift around in the vitreous humor, which is the fluid in the vitreous chamber |
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Term
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Definition
| a light-sensitive membrane in the back of the eye that contains rods and cones, which receive an image from the lens and send it to the brain through the optic nerve; |
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