External Eye Anatomy
Act to protect the surface of the eye from injury
The upper and lower eyelids
The portion of the eye that is located behind the clear cornea and in front of the iris.
The anterior chamber
The cornea provides no focusing power for the eye
False
The hole in the iris that allows light into the eye. Its size changes in response to light.
The pupil
The space behind the iris and in front of the crystalline lens. Also filled with aqueous humor.
The posterior chamber
Images that are focused on the retina are upside-down
True
The white covering of the eye. Opaque and doesn't allow light through.
The Sclera
A layer of protective tissue that covers the front of the eye and the inside surface of the eyelids.
The proper name for the white part of the eye is conjunctiva
False...sclera
Located in front of the crystalline lens. Can either dilate or constrict the size of the pupil to allow the apporiate amount of light in. Recognized as the color part of the eye
The Iris
Has no nerve or blood supply of it own and is transparent, allowing light rays to pass through the retina.
The crytalline lens
The pupil contains a layer of light sensitive cells
False...retina
The clear outer portion of the eye through which light rays pass on their way to the retina. This transparent surface covers the pupil and iris and provides most of the eye's focusing power.
The cornea
Sends signals to the brain to help interpret what we see.
The retina
The point inside of the eye where the optic nerve leaves the eye is called the Macula
False...Optic Disc