Which of the following is used for long sight?

Convex lenses (converging lenses) are used to correct long-sightedness (hypermetropia or hyperopia). In this condition, the eyeball is too short or the cornea has insufficient curvature, causing light to focus behind the retina instead of on it. Convex lenses converge light rays before they enter the eye, moving the focal point forward onto the retina. Concave lenses are used for short-sightedness (myopia), while mirrors (concave or convex) are not used for vision correction.