Defects of Vision and Their Correction (Myopia, Hypermetropia, Presbyopia) MCQs

Q1. Eye donation can restore sight to people who are blind because of a damaged cornea. Which part of the donated eye is actually used in the transplant?

• A.The cornea (the transparent front part of the eye)
• B.The whole brain
• C.The optic nerve
• D.The eyelid

Answer: A. The cornea (the transparent front part of the eye)

Q2. Consider the following statements about defects of vision: (I) Myopia is corrected by a concave lens. (II) Hypermetropia is corrected by a convex lens. (III) Cataract is corrected by wearing spectacles. Which of the above statement(s) is/are correct?

• A.None of these
• B.Only I
• C.Only I and II
• D.Only III

Answer: C. Only I and II

Going back to the NCERT chapter, Correct: I, II. That fits the listed correct option directly - Correct. Quickly on the wrong ones: option A) 'None of these' misses the point - Re-check each statement individually; option B) 'Only I' is wrong because Re-check each statement individually. Hence the answer is C) Only I and II.

Q3. Which defect is NOT corrected by spectacle lenses alone?

• A.myopia
• B.presbyopia
• C.hypermetropia
• D.cataract

Answer: D. cataract

The idea this question leans on: Cataract (cloudy lens) needs surgery, not just spectacles. That fits the listed correct option directly - Correct. Quickly on the wrong ones: option A) 'myopia' is incorrect: Corrected by a concave lens; option B) 'presbyopia' misses the point - Corrected by bifocal lenses. Hence the answer is D) cataract.