eye

The flashcards below were created by user Naheer on FreezingBlue Flashcards.

iris

alter size of pupil so can see objects near or far
pupil

large in low small small in bright light
cornea

transparent layer that protect the eye; refract light
lens

transparent disc that adjusts in siz- bends light so it hits fovea in back of retina
ciliary muscles

sphincter muscles attached to iris that have ciliary fibers attached to lens. control thickness of lens
______ acts like a reflex but can also be consciously controlled

accomodation
accomodation

change focal length of lens by changing curvature of eye lens
sclera

white of eye
choroid

blood supply to eye
retina
- light sensitive rods and cones
- cones-register color
- rods- black and white
fovea

densely packed rods and cones
optic nerve

part of brain; blind spot
fovea
- contains more rods than cones
- light must hit fovea for full acuity
- sensitive to detail
- projects to rest of retina and bain
myopia

inability to see far onjects clearly
hyperopia

inability to see near object clearly