Home › UP Board Class 10 › Science › The Human Eye and the Colourful World › A bifocal lens used for presbyopia + myopia has:
A bifocal lens used for presbyopia + myopia has:
Answer & Solution
Correct answer: B.
1. Distant vision needs a concave lens, used for looking ahead — placed on top.
2. Near vision (reading) needs a convex lens — placed at the bottom.
3. The bifocal stacks the two together.
_Source: NCERT Class 10 Science, Ch 10 "The Human Eye and the Colourful World", §10.2_
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