What type of corrective lens is used for presbyopia

1.	What type of corrective lens is used for presbyopia
Answer» Convex concave lens Presbyopia is the defect of eye in which a person cannot see further as well as nearer objects clearly. This defect of vision commonly occurs to old people because of the:1. weakening of the ciliary muscles.2. reduction in the flexibility of the eye lens.This type of defect can be corrected by using bi-focal lenses. A bifocal lens consists of both convex lens (to correct hypermetropia) and concave lens (to correct myopia).

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