Retina

Your name: Your e-mail address: Your friend's e-mail addresses:

(separate multiple addresses with comma)
Indicates required field
Message (limit 100 characters)
Enter answer below:

(Why the math? It protects against spam)
=
Send
Cancel
Your message has been successfully sent!

This tissue lines the interior back of your eye and makes sight possible. Think of it as camera film: It catches light and sends it to your brain as electrical information via the optic nerve. Your brain interprets this information as the images you see.