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Parts of the Eye

why plastic s...

Question

why plastic spects lens are thicker than glass lens?

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Solution

Dear Student,
Plastic lens are thicker because of their ability to bend light more efficiently, high-index lenses for nearsightedness have thinner edges than lenses with the same prescription power that are made of conventional plastic material. Lighter. Thinner edges require less lens material, which reduces the overall weight of the lenses.
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