What is a common prescription for corrective glasses for someone who has trouble focusing on distant objects?

Individuals who have trouble focusing on distant objects typically suffer from myopia, also known as nearsightedness. This condition occurs when the eyeball is slightly longer than normal or when the cornea has too much curvature, causing distant light rays to focus in front of the retina instead of directly on it. As a result, objects that are far away appear blurry, while close objects can be seen clearly.

The common prescription for corrective glasses in cases of myopia involves concave lenses, which help to diverge light rays sooner, allowing them to focus correctly on the retina. This correction enables individuals with myopia to see distant objects more clearly.

In contrast, hyperopia (farsightedness) involves difficulty focusing on close objects, presbyopia relates to age-associated vision changes affecting near focus, and astigmatism arises from an irregular shape of the cornea leading to distorted vision at any distance. Each of these conditions requires different corrective measures, making myopia the specific focus in this context.