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