Which best describes the type of lens that would help someone who is nearsighted?

Which best describes the type of lens that would help someone who is nearsighted?

• A. Concave lenses would help someone who is nearsighted because the lenses make objects look smaller and closer.
• B. Concave lenses would help someone who is farsighted because the lenses make objects look smaller and closer.
• C. Convex lenses would help someone who is nearsighted because the lenses can make objects look smaller and closer.
• D. Convex lenses would help someone who is nearsighted because the lenses can make objects look larger and farther away.

Answer: (A)

Nearsightedness and how a lens corrects it. When someone is nearsighted, their eye focuses distant light in front of the retina, so distant objects appear blurred. A concave (diverging) lens in front of the eye spreads incoming light rays, which reduces the eye’s tendency to converge too quickly. This helps the rays reach the retina where a clear image can form, making distant objects appear in focus. The overall effect of this lens is to create a suitable image for the eye to process, and it’s why concave lenses are used to treat myopia. The other ideas don’t fit the situation: farsightedness requires a convex lens to converge light, not diverge it; using a convex lens would worsen nearsightedness by increasing the eye’s convergence. The statement about convex lenses making objects look larger and farther away doesn’t describe the correction for myopia.

Nearsightedness and how a lens corrects it. When someone is nearsighted, their eye focuses distant light in front of the retina, so distant objects appear blurred. A concave (diverging) lens in front of the eye spreads incoming light rays, which reduces the eye’s tendency to converge too quickly. This helps the rays reach the retina where a clear image can form, making distant objects appear in focus. The overall effect of this lens is to create a suitable image for the eye to process, and it’s why concave lenses are used to treat myopia.

The other ideas don’t fit the situation: farsightedness requires a convex lens to converge light, not diverge it; using a convex lens would worsen nearsightedness by increasing the eye’s convergence. The statement about convex lenses making objects look larger and farther away doesn’t describe the correction for myopia.