Vision and Ophthalmology Optics and Refraction

Question 1

A patient who is myopic has a far point located:

Accepted Answer

In front of the eye at a finite distance

Answer

At infinity

Answer

Behind the retina

Answer

At the cornea

Question 2

Which type of lens is used to correct myopia?

Accepted Answer

Concave (minus) lens

Answer

Convex (plus) lens

Answer

Plano lens

Answer

Bifocal lens only

Question 3

Presbyopia results from decreased ability of the lens to:

Accepted Answer

Accommodate (change shape) for near vision

Answer

Absorb UV light

Answer

Maintain transparency

Answer

Rotate in the eye

Question 4

In a spherocylindrical lens, the power is equal in all meridians in which component?

Accepted Answer

Sphere only

Answer

Cylinder only

Answer

Both sphere and cylinder

Answer

Neither

Question 5

What does the term 'axis' refer to in a cylindrical lens prescription?

Accepted Answer

Direction of no power (plano meridian)

Answer

Direction of maximum power

Answer

Optical center of the lens

Answer

Diameter of the lens

Question 6

Anisometropia refers to a significant difference in refractive error between:

Accepted Answer

The two eyes

Answer

Near and distance vision in the same eye

Answer

Morning and evening measurements

Answer

Horizontal and vertical meridians