Are Glasses Really Glass?

Safty Glasses Polycarbonate lenses

While we often refer to the lenses as being made of “glass,” almost all lenses are actually made of different types of plastics.  Plastic lenses have many important attributes that make them much more appropriate for prescription eyeglasses. 

First off, plastic lenses are much lighter than glass.  This relieves much of the pressure that a heavy glass lenses can put on your nose.  They are impact resistant and shatter proof which makes them much more suited for outdoor activities and sports.  Plastic lenses also come in a variety of different “indexes.” The index of the material designates how much it focuses the light per any given lens thickness.  That is why high index lenses can be much thinner than standard lenses and thus lighter weight and cosmetically more appealing. 

For all of the different lens materials, there are a few other options to consider.  Photochromatic lenses, most notably marketed under the brand name Transitions change from clear to tinted under exposure to ultraviolet (UV) light.  Photochromatic lenses also block 100% UV light from passing through to the eye.  The newest version of Transitions now darkens in just over a minute and is also available in polarized.  Anti-Glare coatings are also available for all lens materials and significantly reduce the light reflected from the front and back surface of the lens.  Good quality anti-glare coatings minimize halos from lights at night, cut down on glare from computer monitors and other digital displays as well as decrease glare from overhead fluorescent lighting. 

There are so many great lens options available to create a pair of glasses that fits your unique visual enviroment.  Let our skilled opticians guide you through the options to find the lens material and design that will give you both clear vision and smart appearance.