High Definition Lenses
"Do you have 20/20 vision when you wear your glasses but still feel dissatisfied with how you see? You might benefit from high-definition lenses. But there's good news! Recent advances in lens manufacturing have made possible new high-definition eyeglass lenses that correct these aberrations, potentially giving you sharper vision than you've ever had before with eyeglasses. These lenses are designed to provide sharper vision in all lighting conditions and reduce glare for nighttime driving and other night vision tasks. Many brands of high-definition eyeglass lenses currently are available, including high-definition versions of high-index lenses, progressive lenses and photochromic lenses. Keep in mind that for the best vision and comfort, all high-definition lenses should include anti-reflective (AR) coating to eliminate distracting reflections. High-definition lenses are designed to provide sharper vision in all conditions and reduce glare for nighttime driving. With free-form lenses (also called digital high-definition lenses), the fabrication of the lenses from wearer's eyeglass prescription is optimized with computer-controlled surfacing equipment that is much more precise than conventional tools. In fact, free-form technology can surface lenses in power increments of 0.01 diopter (D), compared with 0.125 to 0.25 D increments of conventional eyeglass lens tooling. The fabrication of some digital, free-form lenses also takes into account how the lenses are positioned in front of the wearer's eyes when in the eyeglass frame, to provide the most accurate lens power and the sharpest vision possible."
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