Contact Lens SEMINAR 1

Question 1

Which statement is correct?

A. Scleral lenses are more comfortable to wear than corneal RGP
B. Scleral lenses are more comfortable to wear than soft contact lenses
C. Corneal RGPs are more comfortable to wear than soft contact lenses
D. Corneal RGPs are more comfortable to wear than mini scleral lenses

Answer 1

A

Question 2

Which is an advantage of fitting a corneal RGP lens over an SCL?

A.	Vision
B. 	Presence of corneal irregularity
C.	Handling
D. 	Dry eyes
E. 	Compliance
F.	All of the above

Answer 2

F

Question 3

Miss S (51 years old) attends your clinic for a contact lens fitting (first time). She is an office worker which includes long days at a computer, has a history of dermatitis, frequently complaints of itchy eyelids, and was diagnosed with type 1 Diabetes Mellitus from the age of 8 years.

How many potential contra-indications for CL wear can you detect?

A. 	3
B.	4
C.	5
D.	6
E. 	7

Answer 3

D

Question 4

Mr Pratt (21 years old) would like to try CLs for sports only. You find the following spectacle Rx:

RE -7.00/-1.50 x 180
LE -7.25/-1.25 x 180 BVD 12mm

Which CL Rx would you prescribe?

A. RE -6.50/ -1.25 x 180
LE -6.50/ -1.00 x 180

B. RE -6.50/ -1.25 x 180
LE -6.75/ -1.25 x 180

C. RE -6.50/ -1.25 x 180
LE -6.50/ -1.25 x 180

Answer 4

C

If round down one then round up the other and vice versa

Question 5

How much is the lenticular astigmatism, and in which direction?

Ocular Rx -2.75/-1.00 x 090

K readings of : 8.00mm at 180 and 7.60mm at 90

A.	-3.00 x 090
B.	+3.00 x 090
C.	-1.00 x 090
D.	+1.00 x 090
E.	We don’t have enough detail to answer this

Answer 5

A

Question 6

If silicone is added to a CL material, what can we expect to happen?

A.	Material becomes more stable (strong)
B.	More protein deposits
C.	Less oxygen permeability
D.	Less weight 
E. 	More lipid deposits

Answer 6

E