sensory system

humors

fluid in eye

cornea

outer layer controls light

conjunctiva

covers and lubricates eye

tear glands

make tears

iris

pigmented ring of muscle controls light

pupil

allows in light

lens

focuses light on retina

cilary muscle / suspensory ligaments

moves lens

retina

back of eye processes light

macula

detail and colour vision

optic nerve

to brain

external ear

can be see

middle ear

air filled chamber

inner ear

semicircular canals and cochlea

malleus incus staples

bones in ear

cochlea

filled with fluid and organ of corti

organ of corti

receptor organ

eustachian tube

connects ear to mouth and nose

round window

membrane between middle and inner ear vibrates

auditory nerve

transmits sound and balance info

semi-circular canals

tubes responsible for balance

ampullae

hair like structures in ssc

glaucoma

optic nerve becomes damaged

risk factors of glaucoma

genetics blood presure age

effects of glaucoma

blurred vision rainbow circles

Treatment

eye drops laser surgery

age related macular degeneration

cells of macular become damaged

dry amd

build up of deposits

wet amd

abnormal blood cells

risk factors amd

smoking blood pressure overweight

effects of amd

central vision deteriorates

treatment wet only

eye injections light therapy

cataracts

cloudy patches in lense

causes of cataracts

smoking diabetes steroids

effects of cataracts

blurred or misty vision

cataracts treatment

surgery strong prescription

retinopathy diabetic

high blood sugar damages retina blood vessels hemorrhage

causes of retinopathy

diabetes high blood and cholesterol

effects of retinopathy

blurred vision pain double vision blindness

treatment retinopathy

laser injections surgery

conductive hearing loss

sounds unable to pas from inner ear to outer ear

sensorineural hearing loss

damage to inner ear hair cells or auditory nerve

effects of deafness

impact social setting work low confidence

treatment

hearing aids hearing test cochlear implants