Eye Flashcards
(19 cards)
What is the cornea?
The cornea is a tough, clear covering over the iris and the pupil that helps protect the eye. Light bends as it passes through the cornea.
What is the function of the cornea?
The cornea helps in making an image on the retina; the lens finishes the job.
What is the retina?
The retina is a layer of light-sensitive cells at the back of the eye that detects images focused by the cornea and the lens.
How is the retina connected to the brain?
The retina is connected to the brain by the optic nerve.
What is the pupil?
The pupil is the dark circle in the center of your iris that lets light into the inner eye.
What shape is a human’s pupil compared to a cow’s pupil?
A human’s pupil is round, while a cow’s pupil is oval.
What is the aqueous humor?
The aqueous humor is a clear fluid that helps the cornea keep its round shape.
What is the iris?
The iris is a muscle that controls how much light enters the eye.
Where is the iris located?
The iris is suspended between the cornea and the lens.
What colors can human irises be?
Human irises come in many colors, including brown, blue, green, and gray.
What is the blind spot?
The blind spot is the place where the optic nerve leaves the retina.
What is unique about the blind spot?
Each eye has a blind spot where there are no light-sensitive cells.
What is the optic nerve?
The optic nerve is the bundle of nerve fibers that carry information from the retina to the brain.
What is the lens?
The lens is a clear, flexible structure that makes an image on the eye’s retina.
What is the function of the lens?
The lens is flexible so that it can change shape, focusing on objects that are close up and far away.
What is the vitreous humor?
The vitreous humor is a thick, clear jelly that helps give the eyeball its shape.
What is the sclera?
The sclera is the thick, tough, white outer covering of the eyeball.
What is the tapetum?
The tapetum is the colorful, shiny material located behind the retina.
What is the function of the tapetum?
The tapetum reflects light back through the retina and is found in animals with good night vision.
