Sight

1. a small opening in the iris and controls the amount of light that enters the eye
4. two types: cones and rods
6. also called lazy eye - the breakdown of how one eye works with the brain.
9. is it the outer covering, a protective tough white layer
10. the front transparent part of the sclera where light enters

2. a dark muscular tissue and ring-like structure behind the cornea(indicates eye color)
3. a light-sensitive layer that consists of numerous nerve cells that converts images formed by the lens into electrical impulses.
5. (disease of the eye) the clouding of the normally clear lens of the eye.
7. a group of eye diseases that can cause vision loss and blindness by damaging the optic nerve.
8. behind the pupil, is a transparent structure which changes its shape to focus light on the retina.