Chapter 12

Question 1

Most bandage lenses are made of:
a) PMMA b) HEMA c) glass d) liquid crystal

Answer 1

b) HEMA

Question 2

The maximum time recommended for continuous wear before removal for cleaning and disinfection is: a) 24 hours c) 7 days b) 3 days d) 30 day

Answer 2

D) 30 day

Question 3

Bandage lenses are used in cases of bullous keratopathy for:
a) reducing pain
b) speeding evaporation of corneal fluid
c) enhancing corneal hydration
d) a and b

Answer 3

d) a and b

Question 4

Which of the following adverse effects is related to extended wearing of rigid lenses more than soft lenses?
a) edema b) 3 & 9 o’clock stain
c) neovascularization d) surface deposits

Answer 4

b) 3 & 9 o’clock stain

Question 5

Patients with a tear break-up time of less than ___ seconds should NOT be considered for extended wear.
a) 10 b) 20 c) 30 d) 40

Answer 5

a) 10

Question 6

Patients who have hypesthetic corneas are not good candidates for bandage lenses because:

Answer 6

they do not feel the discomfort that signals a problem

Question 7

Most systemic medications taken by patients are of concern to fitters because they:

Answer 7

cause changes in the tear film

Question 8

Corneal microcysts are caused by:
a) chronic hypoxia b) flat fitting lenses
c) non-preserved solutions d) a and b

Answer 8

Chronic hypoxia

Question 9

After dispensing extended wear lenses, the initial follow-upcheck should be performed:

Answer 9

early in the morning

Question 10

When performing prefitting keratometry, which of the following observations may indicate poor tear quality? a) high dioptric readings b) poor quality mires
c) oblique axis d) all of the above

Answer 10

b) poor quality mires

Question 11

If movement is not readily apparent when evaluating the fit of bandage lenses, the fitter should:

Answer 11

push the lens up with the lower lid

Question 12

The initial follow-up check for extended wear patients should be scheduled __ day(s) after lens delivery.

Answer 12

1

Question 13

What slit lamp illumination is preferred for viewing corneal microcysts?

Answer 13

retro

Question 14

Staining at 3 & 9 o’clock found on a patient with no history of staining at previous follow-ups may signal:

Answer 14

poor keratometry

Question 15

Which RGP parameter is critical for proper tear exchange?
a) thickness b) diameter
c) anterior optical zone d) edge lift

Answer 15

d) edge lift

Question 16

Conventional extended wear soft lenses should be replaced at a maximum age of:

Answer 16

1 year

Question 17

Surface deposits on lenses may:
a) decrease comfort b) cause GPC
c) reduce permeability d) all of the above

Answer 17

d) all of the above

Question 18

Which of the following is a contraindication to the fitting of bandage lenses?
a) neovascularization b) bullous keratopathy
c) inability to follow-up d) diabetes

Answer 18

c) inability to follow-up

Question 19

Which of the following reasons for failure with daily wear lenses may be remedied by switching to extended wear?
a) chronic edema b) frequent lens damage
c) surface deposits d) lens dryness

Answer 19

b) frequent lens damage

Question 20

The most serious immediate risk to wearers of extended wear lenses is from:
a) endothelial changes b) conjunctivitis
c) ulcerative keratitis d) melanoma

Answer 20

c) ulcerative keratitis

Question 21

The most serious long term risk to extended wear patients may be from:
a) endothelial changes b) conjunctivitis
c) ulcerative keratitis d) melanoma

Answer 21

a) endothelial