Which lens is used for correcting 'Hypermetropia' in humans?

Correct option is A

The correct answer is (a) Convex.
· Convex lenses are used to correct hypermetropia, also known as farsightedness. This condition occurs when the light entering the eye focuses behind the retina instead of directly on it, making nearby objects appear blurry.
· A convex lens converges the light rays before they enter the eye, allowing them to focus directly on the retina, thereby correcting the vision.
· Convex lenses are thicker in the middle and thinner at the edges, and they help in converging the diverging light rays from near objects.
Information Booster:
· Progressive lenses: These are multifocal lenses that provide a smooth transition between different focal lengths, typically used to correct presbyopia, which affects near and intermediate vision.
· Concave lenses: Concave lenses are used to correct myopia or nearsightedness. They diverge light rays before they enter the eye, allowing distant objects to be focused on the retina.
· Bifocal lenses: Bifocal lenses contain two different optical powers in one lens, typically used to correct both near and distant vision issues simultaneously, commonly in people with presbyopia.