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Form (1)

King Saud University

College of Applied Medical Sciences

Department of Optometry

Opto 354 Practical Exam

Name …………………….              ID NO……………………

Q. 1  How to correct the following fitting to obtain the Optimum fit .?

A)  ( Dia = 14.00 mm  / BC. = 8.50 mm ) Steep Fitting :

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B)  ( Dia = 14.00 mm / BC . = 9.00 mm ) Flat fitting :

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Q. 2   A 21 Yrs. Old girl wishes to wear contact lenses . Her clinical data are :

 Parameters OD OS K readings 42.00 @180   / 40.50 @90 44.00 @ 180 / 43.00 @ 90 HVID 12.50 mm 12.50 mm VVID 12.00mm 12.00 mm Pupil Dia. 4.00 mm 4.00 mm Ref. -4.50-0.25X180 -2.50-1.00 X 180

Find the initial lenses OU  ?

……………………………………………………………………………………………………………………………

Q1)   (A) BC = 8.80 mm   Dia = 13.50 mm

(B)  BC = 8.70 mm   Dia = 14.50 mm

Q2 )   RX :

 BC Dia Power OD 9.00 mm 14.50 mm - 4.25 DS OS 8.40 mm 14.50 mm - 3.00 DS

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Form ( 2 )

King Saud University

College of Applied Medical Sciences

Department of Optometry

OPTO 456 practical exam

Name ..................                ID #........................

Q (1) Determine the best toric lens design for the following cases ?

Case (1) RX.    - 3.00 - 1.75X 90

k :       43.50 @180

43.50 @ 90

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Case (2)  RX .    - 3.00 - 1.75 x 180

K :     43.00 @ 90

44.75 @ 180

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Q (2) Calculate the axis of this toric lens if the mislocation is 5 counterclockwise : RX: - 3.00 - 1.75 x 085

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Q(1) case 1 : best design is front toric lens

case (2) best design is back toric lens

Q(2) the axis will be : -3.00 -1.75 x 080