chapter 13 anatomy
The anatomy of the eyeball itself is explaned in how many layers
3
How many layers of the cornea?
5
Annulus if Zinn also referred to as
Annular tendon
Ringlike structure surrounding the optic nerve behind the eyeball is called
Annulus of Zinn
The Aqueous humor circulates in both
Anterior chamber and Posterior chamber
Function that involves the capillaries of the ciliary body that produce a fluid called
Aqueous humor
What is the network of blood vessels that lies between the outer coat, the sclera, inner layer, retina and provides oxygen and nourishment for the internal structures of the eye
Choroid membrane
A thin vascular structure with two distinct functions
Ciliary Body
What are concentrated in the central area of the retina and are responsible for color vision
Cones
What is the anterior, transparent continuation of the sclera?
Cornea
The depression in the middle of the macula that is the area of sharpest vision because of its high density cones
Fovea centralis
A smooth muscle that contracts and relaxes to moderate the amount of light that enters the eye
Iris
Muscle to raise the eyelids
Levator palpebrae superior muscle
Boarder of the cornea, btween it and the sclera is called
Limbus
The area of central vision in the retina
Macula lutea
Aqueous humor does what?
Nourishes the cornea and gives shape to the anterior eye and maintains optimum intraocular pressure
Optic disk is also called the ____for its nipplelike appearance
Optic Papilla
Is the small area in the retina where the optic nerve enters the eye
Optic disk
The optic nerves transmits the image to the brain through an opening in the skull termed
Optic foramen
Is the jagged border between the retina and the ciliary body of the choroid
Ora Serrata
What are the sphinter(ringlike) muscles that close the eye
Orbicularis oculi
What is also called the ciliary disk
Pars Plana
Is the opening in the center of the iris where the light continues its progress through to the lens
Pupil
What appear throughout the retina and are responsible for vision in din light
Rods
A ringlike tube that returns excess fluid to the bloodstream
Schlemm's canal
Where refraction begins as light enter the eye
The Cornea
What is in the middle of the eye, highly vascular layer
Uvea
Between the lens and the inner layer, the retina, is a transparent jellylike substance called
Vitreous Humor (vitreous body)
What holds the choroid membrane against the retina to ensure and adequate blood supply
Vitrous Body
The ciliary muscles extend into ciliary process that extend to the____ and form a ring of tiny strands that complete the attachment of the muscles of the ciliary body to the lens
Zonules of Zinn
nourishes the cornea, gives shape to the eye, and maintains optimal intraocular pressure
aqueous humor
eyelid
blephar/o, palpebr/o
corner of the eye
canth/o
The corners of the eyes are referred to as the
canthi
corners of the eye
canthi
provides oxygen and nourishment for internal structures of the eye
choroid membrane
sensory receptor responsible for color vision
cone
Eyelids are lined with a thin, protective mucous membrane called the
conjunctiva
mucous membrane that coats the anterior surface of the eyeball
conjunctiva
membrane that lines eyelids and covers the surface of the eyes
conjuntive/o
pupil
cor/o, core/o, pupill/o
anterior continuation of the sclera
cornea
Impulse from the________ moves the eye
cranial nerves
Is a biconvex, transparent, avascular structure made of protein and covered by an elastic capsule
crystalline lens
ciliary body
cycl/o
tear
dacry/o, lacrim/o
tear gland
dacryoaden/o
tear sac
dacryocyst/o
What attaches the eyeball to the orbit?
extraocular muscles
attach the eyeball to the orbit
extraocular muscles
The outer layer or ___ consists of the sclera and cornea
fibrous tunic
The combining form vitre/o means
glass or glassy
The trabcular network is spongy, porous tissue that serves to drain fluid from the eye in order to maintain healthy
intraocular pressure
iris
ir/o, irid/o
smooth muscle that contracts and relaxes to moderate the amount of light that enters the eye
iris
cornea
kerat/o
produces tears to keep eyes moist
lacrimal gland
Whar is above the eyes that produce tears to keep the eyes moist
lacrimal glands
two small holes into which tears drain
lacrimal punctum
Tears drain into two small holes called the______ in the upper and lower eyelids in the medial canthus, then into the _____ next into ____ then finally into the________
lacrimal punctum, lacrimal ducts, lacrimal sacs, nasolacrimal
The process of producing tears is termed
lacrimation
Outer canthus is termed
lateral
muscle that raises the eyelid
levator palpebrae superior muscle
The cornea and pupil control the amount of what that enters the eye
light
border of the cornea and sclera
limbus
area of central vision in the retina
macula lutea
Inner canthus is termed
medial
secretes oil to lubricate eyelashes
meibomian gland
Sebaceous glands in the eyelids are called
meibomian glands
nose
nas/o
carries tears to the nasal cavity
nasolacrimal duct
The inner layer or ____ consists of the retina
nervous tunic
The eye can be divided into the
ocular adnexa
latin term for right eye is
oculus dextra
latin term for left eye
oculus sinistra
Term for each eye is
oculus uterque
eye
ophthalm/o, ocul/o
area of the retina where the optic nerve enters the eye
optic disk
vision
optic/o, opt/o
The lacrimal glands are located in the upper outer corners of the
orbit
Our eyes is incased on a protective, bony socket called
orbit or orbital cavity
bony socket of the eye
orbit/o
Term related to the function of blinking is
palpebration
where the upper and lower eyelids meet
palperbral fissure
optic disk
papill/o
lens
phac/o, phak/o
opening in iris that allows the light to progress to the lens
pupil
The inner layer of the eye is called
retina
The lens focuses the image on the
retina
inner layer of the eye
retina
sensory receptor responsible for vision in dim light
rod
The outer most lateral and posterior portion of the eye, (white) is called the
sclera
white of the eye
sclera
Term Fovea means a
small pit
The deepest layer of the sclera is the ____ network
trabecular
drains fluid from the eye to maintain healthy intraocular pressure
trabecular network
middle, highly vascular area of the eye
uvea
The middle layer or_____ is composed of the choroid ciliary body and iris
vascular tunic
holds the choroid membrane against the retina to ensure an adequate blood supply
vitreous homor