Download Anatomie und Physiologie Auge

Sample Examination Questions
”Contact Lens Review“
PCO B. Sc. Course Olten, Switzerland, Prof. Andrea Müller-Treiber
Complications in Contact Lens Wear
1.
What is most important in dealing with sudden vision loss in contact lens patients
A
Clean contact lenses
B
Sell a new contact lens/new contact lenses
C
Rule out pathology
D
Make sure that contact lenses show a good wettability
Right answer is C
2.
Which of the following may help to improve dry eye sensation in hydrogel contact lens
wearers
A
Improve contact lens fit
B
Prescribe unpreserved care systems
C
Prescribe rewetting drops
D
All of the above
E
None of the above
Right answer is D
3.
Which of the following mechanisms is the most likely to facilitate the development of
blocked Meibomian glands in contact lens wearers
A
Change from first generation silicone hydrogel contact lenses to second generation
silicone-hydrogel contact lenses
B
Decreased frequency of normal blink rate
C
Slight inferior staining underneath a thin hydrogel contact lens
D
The use of a hydrogen peroxide system with hydrogel contact lenses
Right answer is B
4.
A contact lens patient presents to your office with a middlesized subconjunctival
bleeding (Hyposphagma) temporally on her left eye. She saw the bleeding when she
woke up in the morning and never had it before. Which of the following represents the
most adequate management?
A
The condition is very likely to be caused by the contact lens
B
The patient has to stop contact lens wear and has to return to wear glasses for
correction of his/her refractive error
C
Without a causing trauma the condition requires no action. The patient has to be
informed to see a medical doctor in case of recurrence
D
The patient has to be referred to an ophthalmologist immediately
Right answer is C
5.
3 and 9 o’clock staining is a typical complication with
A
Silicone-hydrogel contact lenses
B
Conventional hydrogel contact lenses
C
Rigid gas permeable contact lenses
D
Has nothing to do with contact lens wear
Right answer is C
6.
Superior Epithelial Arcuate Lesions (SEALs)
A
Cause severe pain
B
Cause generalized conjunctival hyperemia
C
Do normally not affect the cornea
D
Are often asymptomatic
Right answer is D
7.
In a wearer of hydrogel contact lenses you see a concentric ring in the peripheral
corneal epithelium that does not stain properly with fluorescein. The condition is called
A
Superior Limbal Keratitis
B
Epithelial Hyperplasia
C
Peripheral corneal staining
D
Infiltrative keratitis
Right answer is B
8.
Which of the following statements concerning Contact Lens Induced Red Eye (CLARE)
is not correct
A
CLARE is related to the presence of gram negative bacteria in the anterior segment
B
CLARE is another word for microbial keratitis
C
The prevalence of CLARE is lower in extended wear than in daily wear
D
CLARE is a typical complication of hydrogel daily wear
Right answer is B
9.
Which of the following is a typical contact lens complication with silicone-hydrogel
contact lenses
A
Slight conjunctival hyperemia
B
Superior arcuate epithelial lesions (SEALs)
D
Inferior arcuate corneal staining
C
Edema
Right answer is B
10.
Antianxiety medications (benzodiazepam derivates) may be responsible for the
following symptoms in contact lens wearers except of
A
Dry eye
B
Miosis
C
foreign body sensation
D
Allergic conjunctivitis
Right answer is B
11.
Which of the following factors may predispose ocular manifestation of systemic drugs
A
Long term application
B
High dosage
C
Decreased function of liver and/or kidneys
D
All of the above
Right answer is D
12.
Which of the following is not a typical side effect of steroids
A
Corneal edema
B
Mydriasis
C
Increased susceptibility to infections
D
Dry eye
The right answer is B
13.
Which of the following drugs does normally not cause corneal deposits
A
Amiodarone
B
Chloroquine
C
Diazepam
D
Phenothiazine
The right answer is C
14.
What is the most adequate management of patients that develop discolorations of their
contact lenses due to medications intake
A
Discontinue contact lens wear and change to glasses
B
Discontinue medication intake and refer to the family docotor
C
Calm patient and replace contact lenses more frequently
D
Refer to the family doctor
The right answer is C
15.
Which of the following properties do second generation silicone-hydrogel contact
lenses have compared to first generation silicone-hydrogels
A
Higher oxygen permeability
B
Lower modulus
C
Lower water content
D
Decreased wettability
Right answer is B
16.
Which of the following are the driving forces in new developments for contact lenses
and contact lens care
A
Make contact lens wear safer
B
Make contact lens wear more comfortable
C
Make contact lens wear less time consuming
D
All of the above
Right answer is D
17.
Which of the following back surface geometries for hard gas permeable contact lenses
will lead to a good result in most cases in keratoconus with a well centered apex
A
Aspheric with high numeric excenticity
B
Aspheric with a low numeric excentricity
C
Different numeric excentricities in all for quadrants
D
Aspheric with a negative numeric excentricity
The right answer is A
18.
Which of the following is normally not an attribute of a cornea in Pellucid Marginal
Degeneration
A
Butterfly pattern in corneal topography
B
Central corneal thinning
C
High corneal astigmatism against the rule
D
Inferiorly decentered apex
The right answer is B
19.
Which of the following back surface geometries of a hard gas permeable contact lens is
normally not used in fitting a cornea with a corneal transplant
A
Oblong
B
Reverse
C
Aspheric (NE>0.5)
D
Monocurve
Right answer is C