Short-sightedness can be corrected by lenses which are

Short-sightedness can be corrected by lenses which are

Answer Details

Short-sightedness, also known as myopia, occurs when the eye is too long or the cornea is too curved, causing distant objects to appear blurry. To correct this, a lens with a negative or concave curvature is needed to diverge the light before it enters the eye, allowing distant objects to be seen clearly. Therefore, the correct option is a concave lens.