chapter 6 Flashcards
vision
when retina coverts light to nerve impulses
eye
organ of sight
sclera
white of eye; protects eyeball
cornera
transparents centre; allows light to enter and directs it through lens to retina
retina
inside wall
lens
focuses the light
pupil and iris
controls amount of light that enters the eye
what does blue sclera indicate
tissue disorder
strabismus
crossed eyes caused bt weakness of muscle controlling eye movement
diplopia
double vision
amblyopia
decreased vision
esotropia
inward turning of eyes
exotropia
outward turning of eyes
hypertropia
upward squinting
blepharitsis
inflammation of margins of the lid
chalozion
inflammation of meibomian gland
sty/hordeolum
infection of the lid
conjunctivitis
inflammation of conjunctavae caused by bacteria, virus or fungus
trachmoma
type of conjunctivitis caused by chlamydia
uvetitis
inflammation of structures of uveal tract caused by allergens, bacteria, fungi, viruses, chemicals or eye trauma
keratitis
infection of cornea caused by organisms entering corn through an abrasion
keratoconus
progressive thinning of cornea
glaucoma
increased pressureLeading cause of blindness
cataract
clouding of the crystalline lens