ABO NOCE Basic Opticianry Prescription Transposition 5

Question 1

Which of the following prescriptions is the minus cylinder equivalent of +1.50 +1.00 x 180?

Accepted Answer

+2.50 -1.00 x 090

Answer

+1.50 -1.00 x 090

Answer

+2.50 +1.00 x 090

Answer

+0.50 -1.00 x 090

Question 2

What is the purpose of transposing a prescription?

Accepted Answer

To convert between plus and minus cylinder notation

Answer

To change the sphere power only

Answer

To adjust the add power for presbyopia

Answer

To convert prism diopters to degrees

Question 3

If a prescription is -1.75 -0.50 x 020, what is the spherical equivalent?

Accepted Answer

-2.00

Answer

-1.75

Answer

-2.25

Answer

-1.50

Question 4

Transpose -0.25 -0.75 x 135 into plus cylinder form.

Accepted Answer

-1.00 +0.75 x 045

Answer

-0.25 +0.75 x 045

Answer

+0.75 -0.75 x 045

Answer

-1.00 -0.75 x 045

Question 5

In a spherocylindrical lens, the two principal meridians are always separated by:

Accepted Answer

90°

Answer

45°

Answer

180°

Answer

120°

Question 6

A prescription reads +0.50 -1.50 x 080. After transposition, the new cylinder power is:

Accepted Answer

+1.50

Answer

-1.50

Answer

-0.50

Answer

+0.50

Question 7

Which scenario requires understanding prescription transposition in optical dispensing?

Accepted Answer

Verifying a lensometer reading in plus cylinder when the Rx is written in minus cylinder

Answer

Calculating segment height for a bifocal

Answer

Measuring pupillary distance

Answer

Selecting the correct frame bridge size