Eye Test Symbols: What Do They Mean in a Prescription?
Learn what eye test symbols like SPH, CYL, Axis, PD, ADD and Prism mean in your prescription and how they affect your glasses lenses before choosing new lenses
Eye Test Symbols
Learn what eye test symbols like SPH, CYL, Axis, PD, ADD and Prism mean in your prescription and how they affect your glasses lenses before choosing new lenses