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Which part of the eye contributes the greatest refractive power?

easy MCQ 1 mark Class 10 · Science · The Human Eye and the Colourful World
  1. Cornea
  2. Lens
  3. Aqueous humour
  4. Vitreous humour
Answer
Cornea

The correct answer is Cornea — Therefore the component with the greatest power is the cornea.

Step-by-step solution

  1. Identify the refractive powers of the eye components.
  2. Cornea has a refractive power of about +43 dioptres, which is higher than the lens (+20 D) and the humours (+0.5 D).
  3. Therefore the component with the greatest power is the cornea.
Common mistake: Choosing the lens because it is thick and adjustable.

Concept tested: Refractive power of eye components

Published · How this solution was prepared and checked

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