What Are High-Definition Eyeglasses?

By http://www.millenniumparkeyecenter.com/author/
September 15, 2018

Optical Services Chicago ILEyeglasses generally correct vision to 20/20 quality, but some people still feel as if their vision isn’t perfect. This is because they may have what are called higher-order aberrations. These aberrations can cause difficulty seeing at night, glare, halos, blurring, starburst patterns, or double vision.

But thanks to advances in lens manufacturing, new better performing eyeglass lenses, called high-definition lenses, can provide sharper vision than you’ve ever had with eyeglasses. High-definition lenses are meant to provide sharper vision in all lighting conditions and reduce glare for nighttime driving and other night vision needs.

Here’s some more information on high-definition lenses.

Free-form lenses

The most popular type of high-definition eyeglass lenses are called free-form lenses, also sometimes called high-definition lenses. Free-form is the manufacturing process that reduces higher-order aberrations such as spherical aberration that occur in eyeglass lenses created with traditional methods.

These lenses are manufactured with computer-controlled surfacing equipment that is much more precise than conventional tools. This technology can surface lenses in power increments of 0.01 diopter, compared with 0.125 to 0.25 diopter with conventional lens tooling.

Advantages of these lenses

In addition to more accurate milling, production of some free-form lenses also takes into account how the lenses are positioned in front of the wearer’s eyes when in the eyeglass frame. This provides the most accurate lens power for the sharpest vision possible.

Other factors that may be considered include the angle between the eye and the back surface of the lens in different gaze positions. This could be when the wearer is looking off to the side rather than straight through the center of the lens, for instance. The frame size and the position of the wearer’s pupil within the frame outline are also considered.

These new lenses offer a high degree of customization. This can lead to sharper image quality, better peripheral vision, improved contrast sensitivity, and less glare at night.

Want to up the quality of your eyeglasses? Ask us about high-definition eyeglasses next time you’re in for your eye exam. Call us at (312) 996-2020 with any questions or to make an appointment.


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