OPT-2501-Cntct Lns Theory II Unit 4

Question 0

Which of the following is a translating bifocal lens design?

Answer 0

Segmented

Question 1

______________ is a multi-zone concentric soft bifocal contact lens.
Answer

Answer 1

Acuvue Bifocal

Question 2

During the diagnostic evaluation of the following patient, the lens rotates 10 degrees to the left. Which of the following lens parameters would you order for the patient?
Patient’s Refraction: -2.50 -1.00 x 170
Diagnostic Lens: 8.7 -2.50 -1.00 x 170

Answer 2

8.7 -2.50 -1.00 x 180

Question 3

Prism ballast, double slab-off and peri-ballast are all used for what type of lens design?

Answer 3

Soft toric

Question 4

A prism ballast RGP lens requires how much prism for proper orientation?

Answer 4

0.75 to 1.50 D

Question 5

GIVEN THE FOLLOWING Rx: O.D. -2.00 -2.00 x 110

IF THE DIAGNOSTIC TORIC SOFT LENS ROTATES 15 DEGREES CLOCKWISE, WHAT LENS AXIS SHOULD BE ORDERED?

Answer 5

125

Question 6

A bifocal lens in which the power gradually changes from the central area of the lens to the periphery is known as:

Answer 6

An aspheric lens

Question 7

Which of the following lens designs would not provide a good visual result for this patient?
K’s 44.00 @180 / 42.50 @90
Rx -3.50 -1.50 x 90

Answer 7

Soft spherical lens

Question 8

WHEN FITTING A RIGID BACK SURFACE TORIC, APPROXIMATELY __________% OF THE CORNEAL TORICITY MAY BE PLACED ON THE POSTERIOR LENS SURFACE.

Answer 8

66