If a person can clearly see distant objects but cannot bring near objects into focus, which condition is described?

• A. Astigmatism
• B. Near-sighted
• C. Plane mirror
• D. Far-sighted

Answer: (D)

The main idea here is how the eye focuses light onto the retina and what happens when it can’t focus near objects properly. In farsightedness, the eye’s optical system places the focal point behind the retina when looking at near objects. That means the lens would have to become much thicker to bring those close rays into focus, but the eye often can’t increase its power enough, so near objects appear blurry. Distant objects, whose rays are almost parallel, can be focused more easily, so they’re seen clearly. This condition is typically corrected with convex lenses, which help converge light sooner so near objects can be focused on the retina.

Astigmatism would blur vision in ways that aren’t limited to near vision, and near-sightedness would make distant objects blurry but near objects clear. A plane mirror isn’t a vision condition.