See Rock Hard Features and Benefits
A tough-as-nails plastic lens.
Rock Hard™ lens combines all the advantages of plastic with the scratch and abrasion resistance of glass.
SOLA, the world leader in manufacturing ophthalmic lenses from hard resin, has made them even better. By adding a proprietary hard coating, SOLA created Rock Hard™, a superior scratch and abrasion resistant hard resin lens as durable as glass. Rock Hard™ lenses are up to 5-times more impact resistant than regular glass, yet are lightweight for superior comfort.
The innovative hard coating does not distort or affect the optical clarity and is flexible so lenses won't craze or crack. And when it comes to mirror and specialty coatings, Rock Hard™ lenses have excellent compatibility adhesion and abrasion resistance. SOLA Rock Hard™ lenses are available in a wide range of solid or gradient colors, base curves and diameters.
An extremely hard act to follow.
SOLA's hard coating has received the COLTS Quality Seal, having passed the rigorous testing requirements by the accredited ophthalmic industry independent testing facility, COLTS Laboratories. This approval was the first to be awarded to a sunlens manufacturer. When tested against the leading scratch resistant lens coatings, SOLA's hard coating was the only one to achieve the highest rating possible in all areas: 5 stars for abrasion/scratch resistance, adhesion and environmental durability.
Rating Scale:
Stars: 5=Best 0=Fail
Ratio: 1=Uncoated Hard Resin
