Which of the following is intended for the primary purpose of correcting vision?

The primary purpose of eyeglasses and contact lenses is to correct vision. These devices are specifically designed to modify the way light enters the eye, which helps to refocus images on the retina, thereby improving clarity of sight for those with refractive errors such as myopia (nearsightedness), hyperopia (farsightedness), presbyopia, and astigmatism. They are non-invasive and straightforward solutions that can be easily prescribed and adjusted according to individual vision needs.

Prescription medications and treatment for eye diseases may have effects on vision, but they are primarily aimed at treating medical conditions rather than correcting refractive errors directly. Surgical procedures, such as LASIK or cataract surgery, can correct vision but are not classified in the same straightforward manner as corrective lenses. Therefore, while all options may relate to eye care in some capacity, eyeglasses and contact lenses are distinctly focused on the correction of vision itself.