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P-1 Lenses — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceP-1 Lenses2 Marks
Question
What is a bifocal lens?
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Answer

A bifocal lens is a lens of which the upper part is a concave lens to correct myopia and the lower part is a convex lens to correct hypermetropia.

[Note: A person suffering from myopia as well as hypermetropia, uses a bifocal lens. Nowadays, the defects of vision such as myopia and hypermetropia can be corrected using contact lenses or by laser surgery.]

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