ABO NOCE Basic Opticianry General Practice 2

Question 1

A patient's prescription reads +2.50 -1.00 x 090. What is the spherical equivalent?

Accepted Answer

+2.00

Answer

+3.00

Answer

+1.50

Answer

+2.50

Question 2

Which frame measurement represents the longest horizontal dimension of a single lens aperture?

Accepted Answer

A measurement (eye size)

Answer

B measurement (depth)

Answer

DBL (bridge)

Answer

ED (effective diameter)

Question 3

Prentice's Rule states that prismatic effect (in prism diopters) equals:

Accepted Answer

Power (D) × decentration (cm)

Answer

Power (D) × decentration (mm)

Answer

Power (D) / decentration (cm)

Answer

Decentration (mm) / power (D)

Question 4

When transposing a minus-cylinder prescription to plus-cylinder form, the new axis is:

Accepted Answer

Original axis ± 90°

Answer

Original axis unchanged

Answer

Original axis + 45°

Answer

Original axis − 45°

Question 5

A frame marked 54-18-140 has what bridge size?

Accepted Answer

18 mm

Answer

54 mm

Answer

140 mm

Answer

36 mm

Question 6

What is the primary purpose of selecting a base curve for a spectacle lens?

Accepted Answer

To minimize peripheral aberrations and fit the frame design

Answer

To determine the add power

Answer

To set the optical center height

Answer

To establish segment position

Question 7

Which condition is characterized by reduced near vision due to decreased accommodative amplitude associated with aging?

Accepted Answer

Presbyopia

Answer

Hyperopia

Answer

Astigmatism

Answer

Myopia