The "index" of a lens refers to how efficiently it bends light; a higher index means a thinner, lighter lens. Prescription Polarized Sunglasses | Costa Del Mar US
: Options like gaming glasses or migraine-specific tints address modern visual stressors. 2. Select the Right Material (Lens Index) how to buy lenses for glasses
: Designed for those who need help with both near and far vision, offering multiple corrections in a single lens without visible lines. The "index" of a lens refers to how
: Corrects for one focal distance, typically for nearsightedness (indicated by a minus sign) or farsightedness (a plus sign). a higher index means a thinner
Your prescription determines the fundamental design of your lens.