10.9 Sense of Sight

 

Visual Accessory Organs

Eyelid

Conjuctiva

Lacrimal Gland

Extrinsic Muscles

Outer Tunic

Cornea

Sclera

Optic Nerve

Middle Tunic

Choroid Coat

Ciliary Body

Lens

Iris

Aqueous Humor

Pupil

eye anatomy

Inner Tunic

Retina

Fovea Centralis

Optic Disk

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