POLYCARBONATE

POLYCARBONATE --- Optional Extra £50.00, Antireflection Coating £15.00 Extra, Single Vision Only

• Very strong and light with high impact resistance
• Ideal for sports protection
• Used widely for rimless spectacles
• UV protection up to 380nm
• THIS LENS IS ALSO NOT SUITABLE FOR TINTING

Polycarbonate plastic

• Was introduced in 1983 and was the original high index lens material and It provided the ability to make thinner and lighter lenses.
• It suffers from chromatic abberation [ colour fringes ] due to it's low abbe value but has great impact resistance, compared to newer technology, such as high index plastic 1.61 and 1.66 lenses.
• It is often prescribed to peaple with active and dangerous working lives, ie: Emergency services.
• Until the recent introduction of PPG's Trivex lens technology, it was first choice for rimless eyewear.

Qualities

• High impact resistance
• Thinner and lighter than 1.5 index plastic or standard glass.

Drawbacks

• Poor optical qualities, low abbe value.
• More chromatic abberation than most other lenses.
• More prone to scratching than other high index plastics.