Eyeglass Terms

Spring hinge
This type of hinge provides more comfort and resistance than the classical fixed hinge. The flexible temples open to the size of the head and withstand more use and abuse often associated with kids.

A coating that virtually eliminates reflections from the front and back surfaces of your eyeglass lenses.  Without reflections, more light passes through your lenses to help make things look crisper.  It can also make it easier if you spend a lot of time looking at screens and monitors.

Photochromic (Transitions®) lenses automatically get darker and lighter based on the amount of sunlight.  Outside, they can get as dark as sunglasses.  Inside, they become like regular glasses, no matter what type of lighting you have.  These lenses usually take 2-3 minutes to go from dark to clear again

For reduced glare and increased clarity in your vision, a pair of polarized sunglasses can’t be beat. An invisible filter is built into your lenses – making images appear sharper and clearer while reducing the intensity of the sun’s glare.

This material is the most impact-resistant lens available.  Regular glass or plastic lenses carry the risk of shattering in the case of trauma or an accident.  Polycarbonate lenses will not shatter.  Polycarbonate is the same plastic used in bulletproof windows and is 10 times more impact-resistant than glass or regular plastic.