Lens Technology

We have achieved optical excellence in developing advanced indoor light and glare reduction lenses.

Our super thin 1.6 single vision, impact resistant, lenses meet all FDA regulation standards and have been tested under a variety of working conditions. Our proprietary multi-coating technology filters out the harmful wavelengths of light and let the safe spectra pass through naturally. Liife® CR-39 HMC lenses are tinted and infused with full UV protection up to 400nm, keeping ultraviolet light out of your eyes. Finally coated with premium anti-glare coating and combined with blue light blocking agents which reduce the light and glare. See our lens transmission data page for comparative test results.

Liife® brand lenses are truly superior.

The real test is wearing them, they relax your eyes and take away the stress instantly.

Colours still look bright, contrast is increased and comfort is long lasting.

CR-39  Wikipedia Facts:

CR-39, or allyl diglycol carbonate (ADC), is a plastic polymer commonly used in the manufacture of eyeglass lenses.

CR-39 has high abrasion resistance, in fact the highest abrasion/scratch resistance of any uncoated optical plastic. CR-39 is about half the weight of glass with an index of refraction only slightly lower than that of crown glass, and its high Abbe number yields low chromatic aberration, altogether making it an advantageous material for eyeglasses and sunglasses.

CR-39 is also resistant to most solvents and other chemicals, gamma radiation, aging, and to material fatigue. It can withstand the small hot sparks from welding, something glass cannot do.

CR-39 is used in some photographic filters

CR-39 Ballistic Test Results

from the American Academy of Optometry

The impact resistance of thin CR-39 spectacle lenses of nominal thicknesses 1.3, 1.4 1.7 mm was studied using a ballistic test. Lenses were ordered from a single custom optical laboratory to ensure uniform handling, then edged and mounted in a metal industrial frame. Completed spectacles were placed on a headform for ballistic testing using a 6.5 mm steel ball propelled from an airgun.

Our findings show that thin CR-39 lenses provide impact protection from small blunt missiles travelling at moderate speed, and that they are durable under repeated low energy impact. Such lenses may provide adequate eye protection in certain industrial settings, but do not provide adequate protection from small high speed projectiles. Thicker CR-39 lenses must be used whenever there is a significant risk of worker exposure to small high speed missiles in the workplace.

 

 

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