External Eye Anatomy
Act to protect the surface of the eye from injury
The upper and lower eyelids
A transparent disc that light passes through, focusing it on the retina. It has no blood supply of it's own.
The lens
The cornea provides no focusing power for the eye
False
When you're nearsighted and can't see distant objects clearly, doctors call that....
Myopia
The hole in the iris that allows light into the eye. Its size changes in response to light.
The pupil
Transmits electrical signals from the retina to the brain.
The optic nerve
Images that are focused on the retina are upside-down
True
When you can't see objects that are near to you, sometimes called being far-sighted, doctors call it....
Hyperopia
The white covering of the eye. Opaque and doesn't allow light through.
The Sclera
Receives the light at the back of the eye and sends signals to the brain
The retina
The proper name for the white part of the eye is conjunctiva
False...sclera
When the lens of your eye gets cloudy, obstructing your vision, doctors call it...
cataracts
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
The place where the optic nerve attaches to the retina contains no rod or cone cells that receive light, causing your vision to have this.
A blind spot (called the fovea)
The pupil contains a layer of light sensitive cells
False...retina
When your optic nerve starts to deteriorate and gradually stops sending signals to the brain doctors call it...
glaucoma
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
Is the inside of the eyeball filled with a solid mass, a jelly-like liquid, or a gas like a balloon?
A jelly-like liquid.
The organ that can truly be said to "see" and make sense of images made of light is the retina.
False... it's the brain.
True or False: Color blindness in females is rare. People who are color blind are usually male.
True