Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

19.4 Chemistry

Vocabulary Words

cornea the transparent outer coating of the eye
pupil the opening that allows light rays to enter your eye
iris the colored part of your eye
retina the inner surface of the eye
rods light-sensitive neurons in the retina that detect low-intensity light and distinguish black, white, and gray
cones light-sensitive neurons in the retina that detect color
nearsightedness an eye condition that causes distant objects to be blurry
farsightedness an eye condition that causes nearby objects to be blurry
astigmatism a condition in which objects at any distance appear blurry because the cornea or lens is misshapen
Created by: MarieElyn