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...

Low Vision Care: An Overview

Low vision patients are the most under-treated, under-referred and generally overlooked patients in many eyecare practices. With the current growth in the elderly population, this may be a perfect time to re-evaluate your approach to this ever-expanding group of...

Remove Scratches from 1.60 and 1.66 Product

Strange but True: You can easily remove most scratches from 1.60 and 1.66 product with a bowl of water and a microwave. Here's how: 1. Place scratched lens(es) in a bowl of water. Use enough water to ensure the lenses remain covered during the heating period....

Flawlessly Edging Super-Hydrophobic Lenses

In just minutes a day, you too can edge super-hydrophobic lenses flawlessly! Editors note: If you are working with our own ICE, UVARity, TKO Plus, or TKO Ultra, you need not read any further, since each comes with a powder coat that virtually eliminates slippage...

Video: Lens Material Drop Tests

The following videos show the results of drop tests perfomed by Younger Optics on CR-39, Spectralite, 1.60, Polycarbonate, and Trivex. All tests were perfomed using a 500g missile with a 1 mm point. The lenses tested were all front-side coated with a center thickness...

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