The Eye

_____ cushions and protects the eyeball in the skull.

Adipose tissue

Identify the fluid filled space between the cornea and iris. -Anterior chamber -Posterior segment -Posterior chamber -Anterior segment

Anterior chamber

Which of the following structures is highly vascular? - Sclera - Retina - Cornea - Choroid

Choroid

Identify the muscular structure that anchors the lens in place. - Ciliary body - Choroid - Suspensory ligaments - Iris

Ciliary body

Identify the incorrect statement regarding the vitreous body. - Holds the retina against the choroid - Supports the posterior surface of the lens - Consists of a thin, watery fluid - Transmits light

Consists of a thin, watery fluid

Identify the structure that allows light to first enter the eye. - Lens - Cornea - Sclera - Pupil

Cornea

The iris divides the eye into the anterior and posterior segments. True or False

False

The pupil can adjust its size independent of the iris. True or False

False

Identify the structure that regulates the amount of light entering the posterior segment of the eye. -Pupil -Iris -Lens -Cornea

Iris

Which of the following regions is known as the blind spot? - Fovea centralis - Ciliary body - Optic disc - Macula lutea

Optic disc

Which cranial nerve carries visual information from the eyeball to the brain? - Vestibulocochlear nerve - Oculomotor nerve - Olfactory nerve - Optic nerve

Optic nerve

Where is the vitreous body located? - Posterior segment - Posterior chamber - Anterior segment - Anterior chamber

Posterior segment

Identify the neural layer. - Optic nerve - Sclera - Retina - Choroid

Retina

Name the largest portion of the fibrous layer. - Choroid - Cornea - Sclera - Conjunctiva

Sclera

Identify the parts of the fibrous layer. - Cornea and lens - Sclera and cornea - Sclera and conjunctiva - Cornea and iris

Sclera and cornea

Identify the areas that are filled with aqueous humor. -The anterior and posterior chambers - The posterior chamber and the posterior segment -The anterior chamber and the posterior segment -The anterior and posterior segments

The anterior and posterior chambers

Only the fibrous layer can be observed in its entirety from the superficial surface of the cow eye. True or False

True

The eyeball sits in the eye socket also called the _____

bony orbit

Modified sweat glands, called the _____, are found at the base of the hair follicles of eyelashes.

ciliary glands

The transparent mucous membrane lining the inside of the eyelids and covering the anterior surface of the eyeball is called _____

conjunctiva

_____is an inflammation of the conjunctiva.

conjunctivitis (pink eye)

_____ and _____ are hairy structures that protect the eyeball from foreign objects, perspiration, and the direct rays of the sun

eyelashes eyebrows

3 layers of the eyeball include....

fibrous tunic vascular tunic nervous tunic

The _____ is a term for structures that make and drain tears.

lacrimal appartatus

The tears drain through the 2 _____ which lead into the _____. This duct carries the tears into the nasal cavity.

lacrimal canaliculi nasolacrimal duct

The _____are six to 12 ducts that lead from the gland to the conjunctiva of the upper eyelid. It empties the tears onto the eyeball.

lacrimal excretory ducts

Included in the lacrimal apparatus are the _____that produce the tears, or _____.

lacrimal glands lacrimal secretion

From the lacrimal excretory ducts, the tears pass through 2 small pores, the _____, at the medial part of the eyelids.

lacrimal puncta

There are 6 extrinsic muscles that are under voluntary control. They are located on the outside of the eyeball. They are grouped according to their movement.

medial and lateral rectus - move the eyeball from side to side superior and inferior rectus - move the eyeball up and down superior and inferior oblique - rotate the eyeball

The eyelids, or _____, shade, protect, and spread lubricant over the eyeball.

palpebrae

Infection in the ciliary glands is called a _____

sty

Embedded in each tarsal plate are _____ glands that secrete an oily substance to keep the eyelids from sticking together.

tarsal

Inside the eyelid are thick sheets of connective tissue called _____ that gives form and support to the eyelids.

tarsal plates