Eye Anatomy
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Questions and Answers

What is the pupil?

The opening through which light enters the eye

What is the cornea?

The clear tissue that covers the front of the eye

What is the aqueous humor?

Fluid in the eye, found between the cornea and the lens

What is the optic nerve?

<p>The nerve that carries neural impulses from the eye to the brain</p> Signup and view all the answers

What is the optic disc (blind spot)?

<p>Site where optic nerve leaves the eye and lacks photoreceptors</p> Signup and view all the answers

What is the ciliary body?

<p>Structure surrounding the lens that connects the choroid and iris. It contains ciliary muscles, which control the shape of the lens, and it secretes aqueous humor.</p> Signup and view all the answers

What is the macula lutea?

<p>A yellowish central area of the retina that is rich in cones and that mediates clear detailed vision</p> Signup and view all the answers

What is the fovea centralis?

<p>Area consisting of a small depression in the retina containing cones and where vision is most acute</p> Signup and view all the answers

What is the tapetum lucidum?

<p>A layer in the eye of nocturnal mammals that reflects light, causing the eyes to glow when light strikes them at night and that is made up of several layers of flattened cells covered by a zone of refracting crystals</p> Signup and view all the answers

Flashcards

pupil

The opening through which light enters the eye.

cornea

The clear tissue that covers the front of the eye.

sclera

The white outer layer of the eyeball.

iris

The colored part of the eye that controls pupil size.

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aqueous humor

Fluid in the eye between the cornea and the lens.

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optic nerve

The nerve that carries visual information from the eye to the brain.

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optic disc

Site where the optic nerve leaves the eye, lacking photoreceptors.

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vitreous humor

Jellylike substance found behind the lens that maintains the shape of the eye.

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lens

The transparent structure that helps focus images on the retina.

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ciliary body

Structure surrounding the lens that controls its shape and secretes aqueous humor.

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retina

Contains receptor cells that process visual information.

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choroid

The vascular layer between the retina and the sclera.

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macula lutea

A yellowish area of the retina for detailed vision.

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fovea centralis

The spot in the retina for the sharpest vision.

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tapetum lucidum

Reflective layer in nocturnal mammals' eyes, causing glowing eyes at night.

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Study Notes

Eye Anatomy

  • Pupil: The opening in the eye through which light enters.
  • Cornea: The clear, front tissue of the eye.
  • Sclera: The white outer layer of the eye.
  • Iris: The colored portion of the eye that controls pupil size.
  • Aqueous Humor: Fluid between the cornea and lens.
  • Optic Nerve: Carries visual signals from the eye to the brain.
  • Optic Disc (Blind Spot): The point where the optic nerve exits the eye, lacking photoreceptors.
  • Vitreous Humor: Jelly-like substance behind the lens, maintaining the eye's shape.
  • Lens: Transparent structure behind the pupil that focuses light onto the retina.
  • Ciliary Body: Structure around the lens containing muscles to adjust lens shape and secreting aqueous humor.
  • Retina: Contains photoreceptor cells (rods and cones) that convert light into neural signals.
  • Choroid: Middle, vascular layer between the retina and sclera.
  • Macula Lutea: Yellowish area of the retina rich in cones, crucial for detailed vision.
  • Fovea Centralis: Part of the macula lutea with high cone density, providing the sharpest vision.
  • Tapetum Lucidum: Reflective layer in the eyes of some nocturnal animals, enhancing night vision.

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Description

Explore the parts of the eye, including the pupil, cornea, sclera, iris, and lens. Learn about the functions of the retina, choroid, and optic nerve. Understand how these components work together for vision.

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