Make your lens shopping easier with this comparison of features, benefits, lens materials and designs.
The purpose of anti-reflective (AR) coating is to reduce the reflection off the lenses. In bad cases, you can actually see the reflection of your eye in the lens. Similar to a scratch-resistant, AR coating is made of a very hard thin film that is layered on the lens. AR coating makes your eyeglass lenses nearly invisible and eliminates lens reflections that cause glare.
Aspherics are ideal for strong prescriptions because they are flatter and thinner. They also provide better vision than ordinary lenses and look better because they lessen farsighted eye magnification and nearsighted eye minification.
Bifocals and Multifocal Lenses
Bifocals and trifocals come in many sizes and configurations. We will help you choose the right bifocal or trifocal lenses for your needs, depending on whether you sit at a computer all day, work on automobiles, play golf, etc.
Eyeglass Lens Coating
Anti-reflective coating, scratch resistant coating, anti-fog and UV lens treatments are options that enhance your vision and appearance, increase the durability of your eyeglasses and protect your eyes from the sun’s harmful rays.
Learn how new high-definition eyeglass lenses (free-form and wave front lenses) produce sharper vision than regular eyeglass lenses.
The most popular type of high-definition eyeglass lenses are called free-form lenses. 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.
With free-form lenses (also called digitally surfaced eyeglass lenses), the fabrication of the lenses from wearer’s eyeglass prescription is optimized with advanced manufacturing tools (“surfacing” equipment) that are much more precise than conventional tools. In fact, digital, free-form technology can surface lenses in power intervals 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 when optimizing the lens power. Other factors that may be considered in the lens customization process include the angle between the eye and the back surface of the lens in different gaze positions (for example, when the wearer is looking off to the side rather than straight through the center of the lens), the frame size and the position of the wearer’s pupil within the frame outline.
With these and possibly other factors taken into account during lens design and fabrication, high-definition eyeglass lenses offer an unprecedented degree of customization and may reduce or eliminate certain higher-order aberrations.
The precisely-made and personalized surfaces of high-definition lenses may help reduce aberrations that limit field of view and cause starbursts, halos and comet-shaped distortions of lights at night. The end result is that high-definition lenses may provide sharper image quality, better peripheral vision, improved contrast sensitivity and less glare at night.
Popular free-form, single vision lenses for the correction of nearsightedness, farsightedness and/or astigmatism include:
- Unity SVxtra
- Shamir Autograph Digital SV
Popular free-form progressive lenses for the added correction of presbyopia include:
- Unity Via Series
- Shamir Autograph III (Shamir Insight)
- Varilux Physio Enhanced (Essilor of America)
- Shamir Intouch
Because creating high-definition lenses requires additional information beyond what is recorded on your eyeglass prescription, your optician usually will take additional measurements when you choose your eyeglass frames.