ABO NOCE Basic Opticianry Trivia 3

Question 1

What is the primary function of an anti-reflective (AR) coating on eyeglass lenses?

Accepted Answer

To reduce surface reflections and improve light transmission

Answer

AR coatings reduce surface reflections through destructive interference, increasing light transmission and reducing glare for the wearer.

Question 2

What does 'OD' stand for in an eyeglass prescription?

Accepted Answer

Oculus Dexter (right eye)

Answer

OD is the Latin abbreviation for 'Oculus Dexter,' meaning the right eye, used universally in ophthalmic prescriptions.

Question 3

Which prism direction is used to treat an esophoria (tendency for eyes to turn inward)?

Accepted Answer

Base-out prism

Answer

Base-out prism is prescribed for esophoria because it shifts the image outward, reducing the inward convergence demand on the eyes.

Question 4

What is the term for the smallest detail a lens system can distinguish, often expressed as cycles per degree?

Accepted Answer

Resolving power

Answer

Resolving power (or spatial resolution) describes the ability of an optical system to distinguish fine detail, commonly expressed in cycles per degree.

Question 5

A frame with a DBL (distance between lenses) of 18 mm and lens size of 52 mm has what frame PD?

Accepted Answer

70 mm

Answer

Frame PD = lens size + DBL = 52 + 18 = 70 mm; this represents the horizontal width across both lenses.

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Practice Test

ABO NOCE Basic Opticianry Trivia 3