| A | B |
| Binocular Vision | ability to see an object with both eyesat the same time |
| Iris | varies in color and controls the amount of light entering the eye |
| cornea | clear covering of iris that protects the eye from dust particles and foreign matter |
| pupil | opening in the eye through which light passes |
| tears | saline liquid that washes the eye and keeps the cornea moist |
| eyelid | large folds/flaps of skin that wipe the eye clean and spread the tears |
| eyelashes | hiar on the eyelids used to screen large objects from entering the eye |
| lens | flexible disc shaped structured that focuses the image of an object |
| eyeball musicaes | six muscles that are attached to the sides ofthe eye, they keep the two eyes focused on a single point |
| Aqueous humor | transparent liquid behind cornea that helps keep the corneas shape |
| retina | the light- sensitive innermost layer of the eye, that contians cones and rods. The image is prjected on the cones and rods in the retina and let us see colors and shades black and white |
| optic nerve | carries singals from the eye to the brian |
| blind spot | carries singals from the eye to the brian |
| blind spot | area of the retina that the ooptic nerve enters and there are nocones or rodes |