| A | B |
| iris | controls light into eye |
| ciliary muscle | produces aqueous humor |
| aqueous humor | found in anterior chamber |
| lens | lies behind iris, refracts light |
| sclera | outer layer, white of eye |
| cornea | transparent center of sclera |
| choroid | middle layer, rich blood supply, lens & iris part of this |
| retina | inner layer, delicate, rods/cones |
| rods | black/white vision |
| cones | color vision |
| fovea centralis | sharpest vision |
| optic disc | no rods/cones, blind spot, optic nerve attaches |
| canal of Schlemm | aqueous humor reabsorbed here |
| vitreous humor | found in posterior chamber, can't replace |
| refractive structures of eye | cornea, aqueous humor, lens, vitreous humor |
| refraction | bending of light |