Contact lens prescriptions differ from glasses prescriptions mainly due to their placement. Glasses sit about 12 millimeters from the eyes, while contact lenses sit directly on the cornea. This affects the strength needed for vision correction. An optometrist creates separate prescriptions to account for eye curvature and visual acuity.
In contrast, a glasses prescription focuses primarily on the lens power required to correct vision. It does not include measurements for curvature or diameter. Glasses sit farther from the eye than contact lenses, which affects how the lens power is determined.
Additionally, contact lenses are often designed for specific lifestyles. They may be made for daily use or extended wear. Glasses, on the other hand, do not require direct contact with the eye and come in various styles and lens types, such as bifocals.
Understanding these key differences can guide individuals in choosing between the two options. Whether prioritizing convenience or comfort, both choices significantly impact visual clarity. Next, we will explore factors influencing the choice between contact lenses and glasses.