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Anatomy of the Eye

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Choroid

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Provides oxygen and nutrients to the retina; contains blood vessels.

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Optic Disc

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Where the optic nerve exits the eye; creates a natural blind spot since it lacks photoreceptors.

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Optic Nerve

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Transmits visual information from the retina to the brain.

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Tear Film

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Keeps the surface of the eye moist and free from dust, provides nutrients, and aids in light refraction.

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Lens

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Further refracts light to focus it on the retina; can change shape to adjust focus (accommodation).

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Sclera

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Provides protection and form to the eye; known as the 'white of the eye'.

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Cones

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Photoreceptors responsible for color vision and central, high-resolution vision.

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Ciliary Body

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Changes the shape of the lens for focusing, produces aqueous humor.

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Retina

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Contains photoreceptor cells that detect light and convert it into electrical signals.

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Aqueous Humor

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Provides nutrients to the lens and cornea, maintains intraocular pressure.

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Extraocular Muscles

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Control the movement of the eye and direction of gaze.

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Macula

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Responsible for central, high-resolution, color vision.

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Fovea

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The central focal point in the retina, packed with the highest density of cones for sharp vision.

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Vitreous Humor

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Gel-like substance filling the space between the lens and the retina, helping maintain eye shape.

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Pupil

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Controls the amount of light entering the eye.

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Rods

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Photoreceptors responsible for vision at low light levels.

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Cornea

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Refracts light to help focus it on the retina.

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Iris

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Muscle that adjusts the size of the pupil.

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Zonular Fibers

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Suspend the lens and transmit forces from the ciliary muscles to change the lens shape during accommodation.

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Tapetum Lucidum

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Reflective layer behind the retina that aids in night vision; not present in humans.

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