Question

The bifocal lenses are required to correct

• A. Myopia
• B. Cataract
• C. Presbyopia
• D. Astigmatism

Answer 1

The correct option is C

Presbyopia

The correct option is C

Explanation of the correct option:

1. A bifocal lens with such a lens on the upper side and a lens on the lower side is used to correct presbyopia.
2. A bifocal lens with a lens on the upper side and a lens on the lower side is used to correct presbyopia.
3. People with presbyopia require reading glasses with a convex lens; special convex lens preparations usually required the expertise of an optometrist.
4. Contact lenses can also be used to correct presbyopia-related focusing difficulties.

Explanation of the Incorrect option:

Option A:

1. Myopia is a common vision problem also known as short-sightedness.
2. To correct short-sightedness, a concave lens is used (myopia).
3. The concentration of a short-sighted person is directed at the front of the back of the eyeball.
4. The concave lens pushes the light rays apart, bringing them together in sharp focus at the rear of the eye.

Option B:

1. Cataract is an eye condition that leads to clouding of the eye lens.
2. During cataract surgery, bifocal or multifocal intraocular lenses (IOLs) can be used to replace natural lenses.
3. When patients choose to avoid wearing spectacles, cataract experts suggest these lenses as the replacement lenses of choice.

Option D:

Astigmatism and refractive errors such as myopia (nearsightedness) and hyperopia (farsightedness) are also addressed with bifocal contacts (farsightedness).

Final answer: The bifocal lenses are required to correct presbyopia.