The eye defect presbyopia, in which a person loses the power of accommodation for both near and distant vision, is usually corrected using which kind of lens?

1. Presbyopia is old-age loss of accommodation affecting both far and near vision. 2. Distant vision needs a concave correction and near vision needs a convex correction. 3. Bifocal lenses combine a concave upper part and a convex lower part to handle both. 4. A single concave or convex lens corrects only one defect, so those options fail. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 2 Optics "Defects in Eye", p.32_