Lens Materials

Refractive Index The refractive index of a lens material indicates how much the material will refract or bend light as it enters the material from air, by comparing the speed of light in a given material to the speed of light in air. The higher the index number of a...

Video: Lens Material Drop Tests

The following videos show the results of drop tests perfomed by Younger Optics on CR-39, AIR ZOOM ELITE 9 Spectralite, asics buty sklep 1.60, Nike Baratas Polycarbonate, Asics Onitsuka tiger damskie and Trivex. Nike Air Max 2017 Donna All tests were perfomed using a...

Basic Lens Styles

Single Vision Single vision lenses, as the name suggests, correct a single refractive error with a single focal length. Women Air Jordan 13 All Star 2016 When a myopic or hyperopic refractive error exists, spectacles are required to correct vision. Stan Smith Donna...

Trivex vs. Polycarbonate

Even though Trivex has been available for a while now, there is still much debate and confusion about how Trivex and polycarbonate stack up against one another. Nike Air Force 1 Basse We'll lay out the facts and attempt to put the question to rest. Polycarbonate Born...

Focus on Progressive Lenses

It Doesn't Last Forever Eventually it gets everyone. Canotta Indiana Pacers That point in a patient's life comes when no matter how perfect their vision may have been as a young adult, they begin to notice changes. The newspaper becomes more difficult to focus...

Focus on Coatings

Lens Coatings - Advancing the Utility of Spectacle Lenses All optical materials, no matter how advanced or well-suited for a patient's needs, suffer from innate shortcomings specific to the lenses chemical makeup. Tom Brady Michigan Jersey Where crown glass is...

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