collect the different types of lenses used for correcting the eye defects and write a report
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Collect the different types of lenses used for correcting the eye defects and write a report. ... ii) Bi convex lens : It is used to correct Hypermetropia. iii) Bi-focal lens : It is used to correct Presbyopia. iv) Cylindrical lens : It is used to correct Astigmalism.
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