by daniel | Nov 16, 2016 | Glasses Terminology
No-line (progressive) bifocal Actually a type of trifocal with unique optics that allow reading and other “near” activities. There is no visible bifocal or trifocal line which is appealing cosmetically to many people. Often called a “graduated”...
by daniel | Nov 16, 2016 | Glasses Terminology
Optical Center The optical center of the lens is where maximum efficiency of vision occurs and should correspond with the optical center of your pupil. This is NOT necessarily the center of the lens, and its location will depend upon your frame, your interpupillary...
by daniel | Nov 16, 2016 | Glasses Terminology
Pantoscopic Tilt The angle at which your glasses sit before your eyes that allow your eyes to track upward and downward with minimal distortion.
by daniel | Nov 16, 2016 | Glasses Terminology
Polarized Lenses These lenses have become very popular in the sports world. They cut unwanted reflected glare from sunlight bouncing off water, metallic surfaces, pavement, or snow. For example, sunglasses with polarized lenses are popular and useful for fishing,...
by daniel | Nov 16, 2016 | Glasses Terminology
Scratch-resistance Coating Specialized coating for plastic lenses that helps retard scratching or crazing of lenses. Extremely beneficial in most cases for long term preservation of quality vision through your lenses. In the last several years, we’ve seen a...
by daniel | Nov 16, 2016 | Glasses Terminology
Transitional Lenses Lenses that turn dark outdoors and lighten up indoors. Activation is induced by a chemical reaction to ultraviolet (UV) sunlight. Generally, they do not get as dark as sunglasses and will not darken in the car since most car windows block out UV...
