Myopia (near-sightedness) is corrected by:

Myopia, or near-sightedness, is a vision defect where a person can see nearby objects clearly but cannot see distant objects distinctly. This occurs because the light rays coming from a distant object converge **in front of the retina** instead of directly on it. This is typically caused by the eyeball being too long or the curvature of the eye lens being too great. To correct this, the focal point needs to be shifted further back. This is achieved by using a **concave lens** (also known as a diverging lens) of suitable power. The concave lens diverges the parallel light rays from a distant object before they enter the eye, causing them to appear as if they are coming from the eye's far point. Consequently, the eye's lens can then focus these rays exactly on the retina. Summary of corrections: - **Myopia (Near-sightedness):** Concave lens. - **Hypermetropia (Far-sightedness):** Convex lens. - **Astigmatism:** Cylindrical lens.