Chapter 11: Eyes

Chapter 11: Eyes

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

MULTIPLE CHOICE

 

1. Contraction of which eye structure controls the amount of light that reaches the retina?

a.	Retina
b.	Iris
c.	Sclera
d.	Lens

 

 

ANS:  B

The iris is able to dilate and contract, allowing light to reach the retina. The retina is deep within the eye and does not control the amount of entering light. The sclera is not able to dilate and contract. The lens is merely a transparent disc that acts as a focus for the retina.

 

DIF:    Cognitive Level: Remembering (Knowledge)                    REF:   p. 206

OBJ:   Nursing process—assessment          MSC:  Physiologic Integrity: Physiologic Adaptation

 

2. Contraction or relaxation of the ciliary body:

a.	allows voluntary blinking.
b.	changes lens thickness.
c.	regulates peripheral vision.
d.	sends light impulses to the brain.

 

 

ANS:  B

The lens is circularly supported by a framework of fibers from the ciliary body; contraction or relaxation of this structure results in a change in the thickness of the lens, allowing for accommodation as needed.

 

DIF:    Cognitive Level: Remembering (Knowledge)                    REF:   p. 206

OBJ:   Nursing process—assessment          MSC:  Physiologic Integrity: Physiologic Adaptation

 

3. The sensory network of the eye is the:

a.	cornea.
b.	iris.
c.	pupil.
d.	retina.

 

 

ANS:  D

The retina acts as the sensory network of the eye in that it sends electric impulses to the brain that are transformed from light. The cornea, iris, and pupil act together as an opening for light to pass through the lens.

 

DIF:    Cognitive Level: Remembering (Knowledge)                    REF:   p. 206

OBJ:   Nursing process—assessment          MSC:  Physiologic Integrity: Physiologic Adaptation

 

4. Retinal hemorrhages in an infant require investigation for:

a.	retinoblastoma.
b.	retrolental fibroplasia.
c.	pituitary tumor.
d.	child abuse.

 

 

ANS:  D

Beyond newborn age, any hemorrhages to the retina indicate infection, allergy, or trauma and should be further investigated.

 

DIF:    Cognitive Level: Applying (Application)                           REF:   p. 230

OBJ:   Nursing process—assessment          MSC:  Physiologic Integrity: Physiologic Adaptation

 

5. An increased level of lysozyme in the tears will occur normally during which life stage?

a.	Adolescence
b.	Childhood
c.	Infancy
d.	Pregnancy

 

 

ANS:  D

Because of rising hormone levels, an increased amount of lysozyme is present in tears during pregnancy. Tears are not affected by increased lysozyme at any other stage in life.

 

DIF:    Cognitive Level: Remembering (Knowledge)                    REF:   p. 206

OBJ:   Nursing process—assessment          MSC:  Physiologic Integrity: Physiologic Adaptation