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Standard X
Physics
Defects of Vision and Their Correction
Question
Sometimes, a person suffers from both the defects, myopia and hypermetropia. Which of the following is used to correct this defect?
Convex lens
Concave lens
Bifocal lens
Cylindrical lens
A
Concave lens
B
Cylindrical lens
C
Convex lens
D
Bifocal lens
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Solution
Verified by Toppr
Biofocal lenses are used to correct the defect when person suffers from both the defects of vision myopia and hypermetropia.
A biofocal lens has upper portion made of concave lens and lower portion of convex lens with appropriate curvature/ focal length/ power.
The upper portion of the lens facilitates distant vision and lower portion helps in near vision.
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Sometimes, a person suffers from both the defects, myopia and hypermetropia. Which of the following is used to correct this defect?
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