How to Tell Diopter for Reading Glasses: Determine Your Perfect Strength Guide
A diopter indicates the lens power needed for reading glasses. To find it, use the formula 1/focal length in meters. If the lens focuses at 50 cm (0.5 m), the power is 2 diopters. If it focuses at 33 cm (0.33 m), the power is 3 diopters. Adjust the diopter strength for optimal vision clarity. … Read more