What does 12.0 diopter mean?

Answer 1

A diopter is a unit of measurement used to describe the optical power of a lens. A lens with a power of 12.0 diopters means it can converge or diverge light rays to focus at a distance of 1/12 meters, or approximately 8.33 centimeters. This indicates a strong lens, typically used for correcting significant vision impairments such as myopia (nearsightedness) or hyperopia (farsightedness).