The fundamental difference lies in the type of vision problem they solve:
: Using the wrong strength for distance can impair your ability to see hazards while driving or operating machinery, posing a risk to yourself and others.
Prescription vs non-prescription reading glasses - Optical Center can you buy distance glasses over the counter
: Distance prescriptions often involve different powers for each eye and correction for astigmatism—features mass-produced over-the-counter (OTC) glasses do not provide.