Farsightedness, also known as “hyperopia,” is one of the most common eye problems among children and adults around the world. Specifically, farsightedness makes close-up objects look blurry.

Two common defects of the eyes are myopia (short-sightedness) and hyperopia (long-sightedness ... a concave lens in front of the eye, as shown in the diagrams below. Someone who is long-sighted ...