CH 12: Parts of Eye

fluid-filled space between the cornea and iris

watery liquid secreted at the ciliary body-fills anterior and posterior chambers of eye-nourishes cornea, iris and lens

vascular layer

ring of muscle, controls power of the lens

smooth muscle portion of the ciliary body, near-vision capabilities

epithelial tissue-secrete aqueous humor

mucous membrane that lines the eyelids and outer surfaces of the eyeball

bends light to focus image

opens and closes

• depression in the middle of the macula lutea
• sharpest vision here

central region of the retina, responsible for central vision

interior surface of the eye ball: retina, optic disk, macula, posterior pole

oil glands located along the rim of the eyelids

• colored circle
• regulates light passage through pupil

secretes tears

tubes that carry tears to the lacrimal sac

structure that collects tears before emptying into the nasolacrimal duct

bends and focuses light

capsule that encloses the lens

passageway for tears from teh lacrimal sac into the nose

• exit site of retinal nerve fibers
• entrance/exit for arteries and veins

carries impulses of sight from the retina to the brain

center of the iris, light passes through here

• receives/transmits light to the optic nerve
• cones: color, bright light
• rods: dim light

tough, fibrous, white outer coat

jelly-like mass filling the inner chamber between the lens and retina