PD (Pupillary distance)- distance from the center of one pupil to the center of the other. Usually measured by your optician or optometrist.
Single Vision
Single vision lenses are generally for people who are farsighted or nearsighted, but not both. If you require single-vision lenses, you have many options for enhancing the comfort and function of your new glasses.
Anti-Reflective Coating
Non-Glare Lenses. These lenses are great for night driving and computer users. Auto windshields reduce light transmissions by up to 20%. Non-glare lenses help compensate for the lost light and also minimize the annoying and dangerous reflections night drivers’ experience. It reduces the glare from computer screens to help prevent eyestrain, and even makes lenses look thinner, too. It also reduces the “ghost effect” which is caused by reflection from inside the surface of your lenses.
Transitions® Lenses.
They change to be right in any light. As you move from indoors to the outdoors, from soft light to bright, Transitions lenses respond to changes in ultraviolet light and temperature. As UV rays decrease, Transitions lenses lighten. As the rays increase, they darken. You get just the right amount of tint.
Indoors, these lenses have a pleasing neutral tint that helps cut down glare from overhead lights, windows and computer screens. Outdoors, they provide UV protection and a comfortable tint for sun protection.
Transitions Lenses are available in most single-vision and multifocal lens styles and include scratch-resistant coating, as well as UV protection.
Polarized
Polarized lenses are the most effective way to cut down on reflected glare. Regular tinted sun lenses reduce the amount of visible light, but they offer little protection against glare &If you drive a car, you should own a pair of polarized lenses. No other lenses available today reduce annoying sun glare from the dashboard more than polarized lenses. Polarized lenses are available in tints of gray and brown. They can be used for single vision, multifocals and no-line bifocals. For those who work and play in the sun, there are no better lenses than polarized!
Tints
Tints reduce glare and the amount of visible light that enters your eyes. They diminish eyestrain which helps make your eyes healthier and more comfortable. Brown, green and gray tints are best for sunglasses. Rose or pink help people who work in an environment with fluorescent lighting. Tints may also complement your facial tones and make your glasses look more attractive on your face. It’s a good idea to coordinate frame color to tinted lenses, as well.
Ultraviolet UV Protection
Ultraviolet light can’t be seen by the human eye. Studies suggest that UV rays can be harmful to your vision. UV is commonly divided into two types: UV-A and UV-B. It’s smart to protect your eyes against both types of UV light.
All eyewear &UV-A light is less intense than UV-B, but, UV-A penetrates deeper into the eye than UV-B. UV-A is what causes aging.
UV-B light is what causes sunburn of the skin. It can damage the cornea and lens of the eye.
Certain lens materials block UV rays. For example, POLYCARBONATE lenses, our ultimate lens, combines the highest level of impact-resistance in a thin, lightweight lens AND has built-in UV protection.