FREE Optics and Refraction Questions and Answers

Question 1

What type of lens is used to correct myopia?

Accepted Answer

Concave lens

Answer

Convex lens

Answer

Plano lens

Answer

Cylindrical lens

Question 2

Which unit measures the refractive power of a lens?

Accepted Answer

Diopter

Answer

Candela

Answer

Lumen

Answer

Lux

Question 3

What does the Snellen chart primarily assess?

Accepted Answer

Visual acuity

Answer

Color vision

Answer

Depth perception

Answer

Contrast sensitivity

Question 4

Which condition is corrected using a cylindrical lens?

Accepted Answer

Astigmatism

Answer

Myopia

Answer

Hyperopia

Answer

Presbyopia

Question 5

What is the near point of vision for a normal eye?

Accepted Answer

25 cm

Answer

10 cm

Answer

50 cm

Answer

1 meter

Question 6

Which optical instrument is commonly used to determine refractive errors?

Accepted Answer

Phoropter

Answer

Otoscope

Answer

Slit lamp

Answer

Tonometer