Anatomy: Eye
accomodation
ability to focus for close vision(under 20 feet)
cornea
anteriormost part of the sclera- window on the world
fovea centralis
area of acute or discriminatory vision
optic disk
area of retina that lacks photoreceptors
suspensory ligament
attaches the lens to the ciliary body
astigmatism
blurred vision, resulting from unequal curvatures of the lens or cornea
cataract
clouding of the lens, resulting in loss of sight
glaucoma
condition of increasing pressure insidethe eye, resulting from blocked drainage of aqueous humor
ciliary body
contains muscle that controls the shape of the lens
canal of schlemm
drains the aqueous humor of the eye
aqueous humor
fluid that provides nutrients to the lens and cornea
vitreous humor
gel-like substance that helps to reinforce the eyeball
hypertropia
inability to focus well on close objects, farsightedness
night blindness
inability to see well in the dark, often resulting from a vitamin A deficiency
refraction
light bending
convergence
medial movement of the eye during focusing on close objects
myopia
nearsightedness
emmetropia
normal vision
choroid coat
nutritive(vascular) tunic of the eye, heavily pigmented tunic that prevents light scattering within the eye
iris
pigmented diaphragm of the eye
accomodation pupillary reflex
reflec constriction of pupils when viewing close objects
photopupillary reflex
reflex-constriction of pupils when they are exposed to bright light
cornea, aqueous humor, lens, vitreous humor
refractory media of the eye
iris, ciliary muscle
smooth muscle structures(intrinsic eye muscles)
sclera
the "white" of the eye
retina
tunic, containing the rods and cones