Author: Anonymous

For a double segment lens, a 7 mm upper segment height is acceptable.

What is the best method to reduce distorion for high hyperopes with a multifocal segment?

What are advantages of using an intermediate/near progressive for office work? Choose only two. 

When measuring for progressive multifocals, the __________ PD measurements and the ___________ heights need to be accurate. 

A patient wants to order bifocals. Their segment heights are OD: 17 and OS: 14. You should order the same segment height for both lenses.

When measuring a patient’s PD, which reference points produce the least accurate reading?

When a patient has unequal segment heights in their glasses, the patient should be made aware. 

When taking a binocular near PD with a ruler, at what distance must the optician be from the patient in order to get an accurate reading? 

Determine the prescription of the following spherocylindrical lens, given the following lensmeter readings: Reading A = +1.75 D Reading B = 370 Reading C = +7.25 D.

Determine the prescription of the following bifocal lens given the following lensmeter readings: reading A = -7.75 + 1.75 X 045 reading B = -7.50 + 1.75 X 135 reading C = -6.50 + 1.75 X 135