Help and frequently asked questions

What are the advantages and disadvantages of polycarbonate spectacle lenses?

Answer: 

Polycarbonate lenses are made by injection moulding. These lenses have good impact resistance, making them ideal for children, sports and industrial work.

They also have good UV protection and a higher refractive index than CR39.

Disadvantages include the fact that their abrasion resistance is poor - adding an anti-scratch coating can help but reduces the impact resistance slightly.

These types of lenses cannot be tinted easily, either.