What condition may require the use of bifocals as a corrective measure?

Bifocals are specifically designed to assist individuals with presbyopia, a condition that typically develops with age and involves the gradual loss of the eye's ability to focus on close objects. As the lens of the eye becomes less flexible, individuals find it increasingly challenging to read small print or engage in other activities that require clear vision at close range. Bifocals provide a dual prescription within one lens: the upper part of the lens is typically designed for distance vision, while the lower part is tailored for near vision. This design allows individuals to seamlessly transition between different viewing distances without having to switch glasses, making everyday activities such as reading or using a computer more manageable.

In contrast, myopia (nearsightedness), astigmatism (distorted vision due to an irregularly shaped cornea), and hyperopia (farsightedness) generally require different types of corrective lenses. While hyperopia may necessitate corrective lenses that help with distance and near vision, bifocals are specifically a solution for those struggling with the near vision aspect due to presbyopia.