Independent practice material. Not affiliated with the University of the Philippines and not official UPCAT content. Official UP Office of Admissions site

UPCATReviewer

UPCAT Science practice question 40: A converging (convex) lens is used to correct which vision defect?

Correct answer

D. Hyperopia, or farsightedness

In hyperopia the eye focuses light behind the retina, so a converging lens is used to bring the focal point forward. Myopia requires a diverging lens.

A converging (convex) lens is used to correct which vision defect?

  1. Myopia, or nearsightedness
  2. Color blindness
  3. Night blindness
  4. Hyperopia, or farsightednessCorrect

Why D is correct

In hyperopia the eye focuses light behind the retina, so a converging lens is used to bring the focal point forward. Myopia requires a diverging lens.

Why the other options are wrong

A Myopia, or nearsightedness
Myopia focuses light in front of the retina and needs a *diverging* lens to push the focal point back.
B Color blindness
A retinal photoreceptor condition, not a focusing error, so no lens corrects it.
C Night blindness
Usually related to rod-cell function or vitamin A, again not a matter of focal length.
Practice this section as a quizMore Physics questions

Same topic