NCLE Chapter 12

Disposable lenses minimize problems caused by:

a) surface deposits b) a tight fit

c) hypoxia d) loose fitting lenses

A

Most bandage lenses are made of:

a) PMMA b) HEMA c) glass d) liquid crystal

B

. Which of the following is NOT a good reason for patients wanting extended wear lenses?

a) long work hours b) frequent traveler

c) save money on solutions d) erratic work schedule

C

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

D

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

D

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

B

When adverse corneal changes are observed,the fitter should:

a) notify the prescribing doctor

b) adjust the lens parameters accordingly

c) switch to non-preserved solutions

d) all of the above

A

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

A

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

a) the lenses always cause discomfort

b) the lenses interfere with the healing process

c) they do not feel the discomfort that signals a problem

d) they soil lenses more rapidly

C

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

a) cause changes in the tear film

b) make patients forgetful

c) create fluctuations in vision

d) a and b

A

The main difference between conventional extended wear lenses and disposable lenses is in the:

a) material composition

b) replacement schedule

c) reproducibility

d) tint

B

Cloudy vision upon awakening is indicative of:

a) edema

b) 3 & 9 o'clock stain

c) corneal infiltrates

d) vertical striae

A

Therapeutic lenses may serve which of the following functions?

a) pain relief b) corneal protection

c) visual improvement d) all of the above

D

Corneal microcysts are caused by:

a) chronic hypoxia b) flat fitting lenses

c) non-preserved solutions d) a and b

A

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

a) in the early morning

b) during lunch hour

c) in the late afternoon

d) whenever there is an opening

A

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

B

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

a) not fit the patient with bandage lenses

b) instill lubricating drops and evaluate again

c) push the lens up with the lower lid

d) check movement with the retinoscope

C

Which of the following is an indication for extended wear?

a) history of patient compliance

b) history of pollen allergies

c) superman syndrome

d) diabetes

A

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

a) 1 b) 3 c) 7 d) 14

A

What slit lamp illumination is preferred for viewing corneal microcysts?

a) indirect b) retro c) sclerotic scatter d) optic section

B

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

a) deposits b) lens binding c) poor keratometry

d) Rx change

C

Which of the following may be responsible for decreased visual acuity?

a) edema b) surface deposits

c) Rx change d) all of the above

D

Which RGP parameter is critical for proper tear exchange?

a) thickness b) diameter

c) anterior optical zone d) edge lift

D

Long term success with extended wear lenses is dependent upon:

a) frequent follow-up visits

b) proper cleaning and disinfection

c) good lens movement

d) all of these

D

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

a) 2 weeks b) 3 months c) 6 months d) 1 year

D

Surface deposits on lenses may:

a) decrease comfort b) cause GPC

c) reduce permeability d) all of the above

D

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

C

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

B

The most serious immediate risk to wearers of extended wear lenses is from:

a) endothelial changes b) conjunctivitis

c) ulcerative keratitis d) melanoma

C

The most serious long term risk to extended wear patients may be from:

a) endothelial changes b) conjunctivitis

c) ulcerative keratitis d) melanoma

A