10.9 Sense of Sight
| Description/Function | ||
| Visual Accessory Organs | Eyelid | |
| Conjunctiva | ||
| Lacrimal Gland | ||
| Extrinsic Muscles | ||
| Outer Tunic | Cornea | |
| Sclera | ||
| Optic Nerve | ||
| Middle Tunic | Choroid Coat | |
| Ciliary Body | ||
| Lens | ||
| Iris | ||
| Aqueous Humor | ||
| Pupil | ||
| Inner Tunic | Retina | |
| Fovea centralis | ||
| Optic disc | ||
| Vitreous Humor |
Light Refraction - the bending of
light around an object
Images viewed by the eye are upside-down, our brains interpret it properly
Accommodation - the lens changes
shape to focus on objects (ciliary muscles, suspensory ligaments)
Visual Receptors
Rods and Cones - located within the retina, rods for light/dark; cones for color
Retinal neurons --> form optic nerves --> optic chiasma --> thalamus --> visual cortex of the occipital lobe
EYE PROBLEMS: Glaucoma, cataracts,
nearsightedness, farsightedness, eye floaters