Eyes Flashcards
outer layer of the eye is called
fibrous sclera
Middle layer is called
vascular choroid
middle layer includes
pupil, lens, anterior chamber, iris, and ciliary body
Inner layer is called
nervous retina
inner layer contains
optic disc, macula, retinal vessels, vitreous body
cornea function
covers iris and pupil, refracts media of the eye
choroid function
prevents light from reflecting inside, delivers blood to retina
ciliary body function
changes curvature of lens
iris contracts during
bright light and for near vision
lens function
keeps viewed object in focus on the retina
retina function
changes light waves into nerve impulses
corneal light reflex or hirschberg test
shine light on forehead 12 inches away, the reflection should be seen same in each eye
nystagmus (shaking) is normal in relation to
newborns
myopia
nearsightedness, light rays focus in front of retina
myopia causes
globe is too long, cornea is curved
