10 - The Eye
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
