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The Human Eye and Colourful World
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28/08/2021 7:24 pm
Topic starter
The picture given here shows a person wearing ‘half-moon’ spectacles. What sort of eye defect do you think he has? Why are these particular spectacles useful to him?
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28/08/2021 7:25 pm
Half moon spectacles are used for reading. so, the person has long-sightedness.
These particular spectacles are useful to him since the convex lenses of spectacles form the image of nearby object (like a book in hand) at the near point of his eye.