NOCE - National Opticianry Competency Examination Ophthalmic Optics and Lenses Questions and Answers

Question 1

A patient is looking 5 mm below the optical center of a lens with a power of -6.00 D in the vertical meridian. According to Prentice's Rule, what is the amount and direction of the induced prism?

Accepted Answer

3.0 Δ Base Up

Answer

3.0 Δ Base Down

Answer

1.2 Δ Base In

Answer

1.2 Δ Base Up

Question 2

A patient with significant anisometropia is experiencing vertical imbalance and diplopia when reading through their new bifocal lenses. Which of the following is the most appropriate solution to correct this issue?

Accepted Answer

Slab-off (bicentric grind)

Answer

Increasing the pantoscopic tilt

Answer

Applying an anti-reflective coating

Answer

Switching to a trifocal lens

Question 3

An optician is helping a patient select a lens material. The patient is very sensitive to color fringes (chromatic aberration), especially in their peripheral vision. Which of the following lens materials would be the best recommendation?

Accepted Answer

Crown Glass (Abbe ≈ 59)

Answer

Polycarbonate (Abbe ≈ 30)

Answer

High-Index 1.67 (Abbe ≈ 32)

Answer

High-Index 1.74 (Abbe ≈ 33)

Question 4

According to ANSI Z80.1 standards for dress eyewear, what is the primary purpose of these regulations?

Accepted Answer

To provide recommendations and tolerances for the optical and physical characteristics of prescription lenses.

Answer

To mandate specific lens materials for all prescriptions.

Answer

To regulate the pricing of ophthalmic frames and lenses.

Answer

To specify the required training and certification for opticians.

Question 5

A patient's pupillary distance (PD) is 62 mm. They have selected a frame with an 'A' measurement of 52 mm and a distance between lenses (DBL) of 18 mm. What is the total decentration required for this order?

Accepted Answer

8 mm

Answer

4 mm

Answer

10 mm

Answer

2 mm

Question 6

Which of the following optical aberrations is caused by a lens material's inability to focus all wavelengths of light to a single point, resulting in color fringing?

Accepted Answer

Chromatic Aberration

Answer

Spherical Aberration

Answer

Coma

Answer

Distortion

A patient is looking 5 mm below the optical center of a lens with a power of -6.00 D in the vertical meridian.According to Prentice's Rule, what is the amount and direction of the induced prism?

A patient is looking 5 mm below the optical center of a lens with a power of -6.00 D in the vertical meridian.
According to Prentice's Rule, what is the amount and direction of the induced prism?