FREE ABO NOCE Basic Opticianry Ophthalmic Optics and Principles Questions and Answers

Question 1

A patient's prescription is -5.00 DS, and their monocular PD is 32mm OU.
The finished eyewear is fabricated with the geometric centers placed at a total distance of 70mm.
How much total prism is induced by the error?

Accepted Answer

3.0Δ Base Out

Answer

1.5Δ Base Out

Answer

3.0Δ Base In

Answer

1.5Δ Base In

Question 2

What is the focal length of a +4.00 D lens?

Accepted Answer

25 cm

Answer

40 cm

Answer

4 meters

Answer

-25 cm

Question 3

Which of the following is an optical aberration that occurs because a lens material refracts different wavelengths of light at slightly different angles, causing color fringes?

Accepted Answer

Chromatic Aberration

Answer

Spherical Aberration

Answer

Barrel Distortion

Answer

Oblique Astigmatism

Question 4

What is the correct minus cylinder transposition of the prescription +1.75 +2.25 x 045?

Accepted Answer

+4.00 -2.25 x 135

Answer

+1.75 -2.25 x 135

Answer

+4.00 +2.25 x 135

Answer

-0.50 -2.25 x 135

Question 5

A patient is refracted with a prescription of -12.00 D at a vertex distance of 10mm. If their new glasses are fit with a vertex distance of 14mm, what compensated power should be ordered to provide the same effective power?

Accepted Answer

-12.50 D

Answer

-11.50 D

Answer

-12.00 D

Answer

-13.00 D

Question 6

Which of the following lens materials generally has the highest index of refraction?

Accepted Answer

High-Index 1.74

Answer

Polycarbonate

Answer

CR-39

Answer

Trivex

A patient's prescription is -5.00 DS, and their monocular PD is 32mm OU.The finished eyewear is fabricated with the geometric centers placed at a total distance of 70mm.How much total prism is induced by the error?

A patient's prescription is -5.00 DS, and their monocular PD is 32mm OU.
The finished eyewear is fabricated with the geometric centers placed at a total distance of 70mm.
How much total prism is induced by the error?