ABO NOCE Practice Test

What is the most common corrective lens for farsightedness?

1. Minus lens

2. Plus lens

3. Concave lens

4. Convex lens

The correct answer is: Plus lens

The most common corrective lens for farsightedness, or hyperopia, is the plus lens. This type of lens has a positive optical power, which helps to converge light rays before they enter the eye. In individuals with farsightedness, the eyeball may be too short, or the cornea may have insufficient curvature, causing distant images to be focused behind the retina. By using a plus lens, the light rays are bent inwards, allowing the images to focus directly on the retina instead of behind it. This correction enables individuals who are farsighted to see objects at various distances more clearly, particularly those close to them. While a minus lens is used to correct nearsightedness (myopia) by diverging light rays, concave lenses are simply another term for minus lenses. Convex lenses, which are referred to as plus lenses, are the specific term used to describe optics that assist individuals with hyperopia. Thus, the choice of a plus lens is essential for effectively addressing and correcting the visual challenges faced by those with farsightedness.