![]() 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. 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. ![]() 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. High-definition lenses are designed to provide sharper vision in all conditions and reduce glare for nighttime driving. The term "free-form" refers to an advanced manufacturing process that reduces higher-order aberrations such as spherical aberration that occur in eyeglass lenses created with traditional eyeglass lens manufacturing tools and processes. The most popular type of high-definition eyeglass lenses are called free-form 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. Many brands of high-definition eyeglass lenses currently are available, including high-definition versions of high-index lenses, progressive lenses and photochromic lenses. These lenses are designed to provide sharper vision in all lighting conditions and reduce glare for nighttime driving and other night vision tasks. These aberrations may be due to the optical characteristics of your eyes or can be caused by the optical limitations of conventional eyeglass lenses.īut 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. Sometimes, higher-order aberrations can affect your vision, even if your prescription eyeglasses fully correct your nearsightedness, farsightedness and/or astigmatism. ![]() 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. ![]()
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