Chapter 21 Homework

Front 1

Visual acuity refers to:

Back 1

Sharpness of vision

Front 2

Refraction is:

Back 2

The ability of the eye to bend light rays so that they can be focused on the retina

Front 3

A person who cannot see objects at a distance has a condition known as:

Back 3

Myopia

Front 4

A person who cannot see close objects has a condition known as:

Back 4

Hyperopia

Front 5

Which of the following represents a decrease in the elasticity of the lens as a result of the aging process?

Back 5

Presbyopia

Front 6

An optometrist performs all of the following except:

Back 6

Performs eye surgery

Front 7

Which of the following individuals interprets and fills ophthalmic prescriptions, such as a prescription for eyeglasses?

Back 7

Optician

Front 8

The Snellen eye chart is used to:

Back 8

Assess visual acuity

Front 9

The Snellen Big E chart is used with:

Back 9

Preschoolers

Front 10

A Snellen eye test is conducted at a distance of:

Back 10

20 feet

Front 11

Which of the following represents an error in the Snellen eye testing technique?

Back 11

Asking the patient to close the eye not being tested

Front 12

A patient has a distance visual acuity of 20/40 in the left eye. At what distance would a person with normal acuity be able to read this line?

Back 12

40 feet

Front 13

Using the right eye, the patient reads the line marked 20/30 with one error. How would you chart this?

Back 13

OD 20/30 -1

Front 14

Near visual acuity testing is conducted with the patient holding the test card:

Back 14

At a distance of 14 to 16 inches

Front 15

What is the most common color vision defect?

Back 15

Congenital color vision defects

Front 16

How much time should the patient be given to identify the number on each Ishihara color plate?

Back 16

3 seconds

Front 17

When not in use, Ishihara color plates must be protected from:

Back 17

Light

Front 18

When performing eye irrigation, the solution should be released:

Back 18

At the inner canthus

Front 19

An eye instillation may be performed to:

Back 19

Treat an eye infection

Front 20

Which of the following represents an error in the eye instillation technique?

Back 20

Instilling drops onto the center of the cornea

Front 21

The range of frequencies for normal speech is:

Back 21

300 to 4000 Hz

Front 22

Which of the following can result in sensorineural hearing loss?

Back 22

Intense noise

Front 23

Which of the following can result in conductive hearing loss?

Back 23

Serous otitis media

Front 24

Which of the following is an example of a tuning fork test?

Back 24

Weber test

Front 25

Which of the following is the most specific type of hearing test?

Back 25

Audiometry

Front 26

Tympanometry is most useful in diagnosing patients with:

Back 26

Serous otitis media

Front 27

Pulling the ear upward and backward

Back 27

Pulling the ear upward and backward

Front 28

Impacted cerumen can be softened by:

Back 28

Instilling several drops of warm mineral oil into the ear

Front 29

During ear irrigation, which of the following techniques is performed to prevent injury to the tympanic membrane?

Back 29

Injecting the irrigating solution toward the roof of the ear canal

Front 30

An ear instillation may be performed to:

Back 30

Treat an ear infection

Front 31

After performing an ear instillation, the patient is instructed to lie on the unaffected side to:

Back 31

Allow complete distribution of the medication

Front 32

Engulfs bacteria by phagocytosis

Back 32

Neutrophils

Front 33

Has a purple multilobed nucleus (3 to 5 lobes) with many fine granules in the cytoplasm

Back 33

Neutrophils

Front 34

Has a round or slightly indented nucleus that almost completely fills the cell and stains a deep purplish blue

Back 34

Lymphocytes

Front 35

Has a segmented nucleus of no more than 2 lobes with bright reddish- orange granules in the cytoplasm

Back 35

Eosinophils

Front 36

Has large, coarse granules that contain histamine and heparin

Back 36

Basophils

Front 37

Increases during an allergic reaction

Back 37

Eosinophils

Front 38

Increases during certain viral diseases, such as mononucleosis

Back 38

Lymphocytes

Front 39

It is the first leukocyte to respond to tissue damage

Back 39

Neutrophils

Front 40

Largest white blood cell

Back 40

Monocytes

Front 41

Normal range is 0% to 1%

Back 41

Basophils

Front 42

Normal range is 50 to 70%

Back 42

Neutrophils

Front 43

Produces antibodies

Back 43

Lymphocytes