10 - The Eye

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False

A cataract is a condition in which the cornea becomes less transparent and "milky" in appearance. (T/F)

I

Aqueous Humor

False

Aqueous humor is the watery fluid in the posterior chamber of the eye. (T/F)

True

Cataracts may be caused by exposure to the ultraviolet radiation of the sun. (T/F)

C

Choriod

True

Colorblindness is a malfunction of the cones of the eye. (T/F)

True

Cones are used for day vision or vision in bright light. (T/F)

J

Cornea

A

Lens

False

Dilation of the pupil is caused by the contraction of circular fibers of the iris. (T/F)

True

Dim light is able to stimulate the rods in the eye. (T/F)

E

Fovea Centralis

False

If the circular iris muscles are contracted, the rods of the eye are probably being used to see. (T/F)

True

In bright light, the iris muscles would tend to contract the pupil. (T/F)

False

In very dim light the circular fibers of the iris contract, causing the pupil to dilate. (T/F)

F

Iris

L

Lacrimal Caruncle

True

Looking directly at an object in bright light would give us greater visual acuity because the light would be focused on the fovea centralis. (T/F)

True

One of the functions of the fluids in the eye is to focus light. (T/F)

M

Optic Nerve

False

Presbyopia is a term for the nearsightedness of old age. (T/F)

G

Pupil

B

Retina

D

Sclera

Cornea

Sometimes called the window of the eye

Cones

Structures in the retina that are able to respond to color

Rods

Structures in the retina that respond in dim light

A

The "blind spot" of the eye is also called the: Select one: a. optic disc b. fovea centralis c. macula lutea d. choroid layer

A

The choroid layer: Select one: a. prevents the scattering of incoming light rays b. is the white of the eye c. produces tears d. helps focus light on the rear of the eye

True

The ciliary muscle affects the eye's ability to focus. (T/F)

Iris

The colored part of the eye

C

The colored part of the eye is called the: Select one: a. lacrimal gland b. conjunctiva c. iris d. pupil

A

The cones in the eye: Select one: a. are part of retina and also respond to red, green, and blue b. are part of the retina layer c. respond to the colors red, green, and blue d. are used to see in dim light

False

The conjunctiva is the clear part of the sclera of the eye. (T/F)

A

The conjunctiva: Select one: a. is a mucous membrane covering part of the eye b. opens and closes to regulate the light entering the eye c. is the clear part of the sclera d. is the colored part of the eye

True

The cornea is considered part of the sclera. (T/F)

B

The cornea: Select one: a. is the colored part of the eye b. is the clear part of the sclera in the front of the eye c. is the mucous covering of the eye d. produces tears

False

The greatest concentration of rods is found in the macula lutea. (T/F)

Pupil

The hole in the eye that lets light in

Retina

The innermost layer of the eye

D

The innermost layer of the eye is the: Select one: a. conjunctiva b. choroid c. sclera d. retina

False

The iris is actually an involuntary muscle in the choroid layer. (T/F)

False

The iris is considered part of the sclera. (T/F)

True

The lacrimal gland produces tears that keep the eyes moist. (T/F)

Choroid

The layer of the eye that keeps light from scattering in the eye

Conjunctiva

The mucous membrane covering part of the sclera

False

The nerve impulse of the eye begins when light enters the pupil of the eye and ends in the occipital lobe of the brain. This is called the visual pathway. (T/F)

False

The optic disc is able to respond only to bright light. (T/F)

False

The potentially blinding condition called glaucoma can occur if the fluid pressure of the eye drops too low. (T/F)

False

The pupil is the colored part of the eye. (T/F)

A

The pupil: Select one: a. is a hole that lets light into the eye b. produces tears c. is the colored part of the eye d. helps focus light on the rear of the eye

True

The retina is the innermost layer of the eye. (T/F)

A

The rods in the eye: Select one: a. are used to see in dim light b. are part of the choroid layer c. are part of the retina and also respond to red, green, and blue d. respond to the colors red, green, and blue

A

The vitreous humor: Select one: a. is found in the posterior chamber b. is a watery fluid in front of the lens c. is found in the anterior cavity d. is found in both the anterior and posterior chambers

Sclera

The white of the eye

A

The white part of the eye is called the: Select one: a. sclera b. choroid c. cornea d. iris

False

The yellowish area near the center of the retina is called the fovea centralis. (T/F)

False

There are three kinds of cones, each sensitive to a different color: red, yellow, or blue. (T/F)

H

Vitreous Humor

True

Vitreous humor is the thick fluid in the posterior chamber of the eye. (T/F)

B

Which of the following is not considered one of the layers of the eye? Select one: a. retina b. iris c. sclera d. choroid

D

Which of the following is not part of the choroid layer? Select one: a. the ciliary muscle b. the iris c. all of the these are part of the choroid layer d. the cornea


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