Eye Anatomy and Functions Quiz

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Questions and Answers

What does the combining form ophthalm/o mean?

  • Glassy
  • Tears
  • Iris
  • Eye (correct)

What does the combining form ir/o mean?

  • Tears
  • Eye
  • Glassy
  • Iris (correct)

What does the combining form vitre/o mean?

  • Tears
  • Glassy (correct)
  • Eye
  • Iris

What does the combining form lacrim/o mean?

<p>Tears (B)</p> Signup and view all the answers

_______ is the fluid found in the anterior chamber of the eye.

<p>Aqueous humor</p> Signup and view all the answers

An ________ is a medical doctor who specializes in treating eye disorders.

<p>Ophthalmologist</p> Signup and view all the answers

What is the ability to see one image using both eyes called?

<p>Binocular vision</p> Signup and view all the answers

What are the sensitive receptor cells of the retina responsible for peripheral vision?

<p>Rods</p> Signup and view all the answers

Where is the area of sharpest vision in the eye located?

<p>Fovea centralis</p> Signup and view all the answers

What is the bending of light rays passing through the cornea, lens, and other structures of the eye called?

<p>Refraction</p> Signup and view all the answers

What is the colored portion of the eye called?

<p>Iris</p> Signup and view all the answers

What is the dark opening in the center of the iris called?

<p>Pupil</p> Signup and view all the answers

What is the transparent, biconvex body behind the pupil that bends and focuses light rays?

<p>Lens</p> Signup and view all the answers

What is the middle vascular layer of the eye called?

<p>Choroid</p> Signup and view all the answers

The posterior, inner part of the eye is called the __________ of the eye.

<p>Fundus</p> Signup and view all the answers

What structure contains the muscles that control the shape of the lens?

<p>Ciliary body</p> Signup and view all the answers

Because there are no light receptor cells in the ___________, it is known as the blind spot of the eye.

<p>Optic disk</p> Signup and view all the answers

What is the delicate membrane that lines the undersurface of the eyelids and covers the anterior eyeball?

<p>Conjunctiva</p> Signup and view all the answers

What is the point at which optic nerve fibers cross in the brain called?

<p>Optic chiasm</p> Signup and view all the answers

When the ciliary body changes the size and shape of the lens by contracting or relaxing, what is this adjustment known as?

<p>Accommodation</p> Signup and view all the answers

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Study Notes

Eye Anatomy and Functions

  • Ophthalm/o: Combining form meaning "eye."
  • Ir/o: Combining form indicating "iris."
  • Vitre/o: Refers to something "glassy."
  • Lacrim/o: Combining form that means "tears."
  • Aqueous Humor: The fluid located in the anterior chamber of the eye.
  • Ophthalmologist: A medical doctor specializing in eye disorders.

Vision Concepts

  • Binocular Vision: Ability to see one image using both eyes.
  • Rods: Receptor cells in the retina responsible for peripheral vision.
  • Fovea Centralis: Area of sharpest vision in the eye.

Light and Eye Structures

  • Refraction: Bending of light rays as they pass through the eye structures (cornea, lens) towards the retina.
  • Iris: The colored part of the eye.
  • Pupil: Dark opening at the center of the iris.
  • Lens: Transparent, biconvex structure behind the pupil that focuses light rays.
  • Choroid: Middle vascular layer of the eye.
  • Fundus: Posterior, inner part of the eye.

Additional Eye Components

  • Ciliary Body: Contains muscles that control the shape of the lens, aiding in focusing.
  • Optic Disk: Known as the blind spot; lacks light receptor cells.
  • Conjunctiva: Delicate membrane that lines the underside of eyelids and covers the anterior eyeball.
  • Optic Chiasm: Point in the brain where optic nerve fibers cross.
  • Accommodation: Refractory adjustment when the ciliary body alters lens size and shape.

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