Convex lens are used to correct presbyopia as the object you see is out of focus convex lens converges the light rays and brings in focus to your reach your retina. whereas bifocals are types of prescription glasses used in presbyopia. there are different types of bifocals used. For presbyopia only convex lens are used.
Explanation: Convex lenses are used to treat presbyopia, hypermetropia and aphakia. If parallel light is brought to a focus at 1 metre the lens is said to have 1 dioptre of power.
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Convex lens are used to correct presbyopia as the object you see is out of focus convex lens converges the light rays and brings in focus to your reach your retina. whereas bifocals are types of prescription glasses used in presbyopia. there are different types of bifocals used. For presbyopia only convex lens are used.
Answer: Convex lenses
Explanation: Convex lenses are used to treat presbyopia, hypermetropia and aphakia. If parallel light is brought to a focus at 1 metre the lens is said to have 1 dioptre of power.