What Is The Difference Between 1.61 And 1.67 Index Lenses?
What Is The Difference Between 1.61 And 1.67 Index Lenses? 1.67 high-index lenses surpass in thinness and lightness when compared to 1.61 high-index lenses. It helps with eye distortion caused by stronger prescriptions and is ideal for individuals with an SPH correction between +/- 7.00 and +/- 9.00, and a CYL correction between +/- 3.25