Parts of the Eye (1)
The outermost, clear layer of the eye that refracts light entering the eye.
What is the cornea?
The colored part of your eye. It is a muscle that controls the size of the pupil.
What is the iris?
The numbers that indicate normal vision for a human.
a) 20/100
b) 20/50
c) 20/20
What is 20/20?
The spot where the optic nerve connects with the retina, it has no photoreceptors.
What is the optic disc or blind spot?
The opening at the center of the iris through which light passes.
What is the pupil?
The layer of cells lining the back wall inside the eye where light is focused.
What is the retina?
A refractive error that makes far-away objects look blurry.
What is myopia or nearsightedness?
This is how many muscles are attached to each eye to control the movement of the eye.
What is six?
This structure bends the light after entering through the pupil and focuses it on the retina to create a clear image.
What is the lens?
Connected to the back of the eye, this sends visual messages to the brain to help you see.
What is the optic nerve?
A refractive error that makes close-up objects look blurry.
What is hyperopia or farsightedness?
The term for cutting open a body part to study the internal structures.
What is dissection?
These photoreceptor cells are located on the retina and are most sensitive to light and dark changes, shapes, and movement.
What are rods?
These photoreceptor cells located on the retina are not as sensitive to light, but help us to see different colors.
What are cones?
These help people with common vision problems by helping to focus light on the correct part of the retina, bringing an image into clarity.
The name for a doctor that takes care of your eyes.
What is an opthamologist or optometrist?
The transparent, gel-like substance that fills the space between the lens and the retina.
What is the vitreous humor?
The white part of the eye that covers, protects, and gives they eye its shape.
What is the sclera?
As a person ages, this is the gradual loss of the eyes' ability to focus on nearby objects.
The layer of tissue behind the retina of some animals that reflects light to allow them to see better in low light.
What is the tapetum lucidum?