Answer:
Glasses can help people who are farsighted, or have trouble seeing nearby text and objects. Glasses can also help people who are nearsighted, or have difficulty seeing text and objects far away. For nearsighted people, concave lenses, or lenses that curve inward, refract light into a single point of focus. For farsighted people, convex lenses are used, as these lenses are curved outward away from the eye to retract light and decrease image distances. These lenses are also used in microscopes which can magnify objects many times.
Step-by-step explanation:
Nearsighted - You can see near, but not far
Farsighted - You can see far, but not near
Concave - Curving inward
Convex - Curving Outward