Materials:

What  the  Lens  is  made  of:

Airwear: Polycarbonate

Plastic: lighter weight and more impact resistant than glass buy easy to scratch.

Glass: scratch resistant but heavy and not very impact resistant.

A Corrective lens is a complete system defined by three (3) dimensions:

• the correction (what the lens corrects)
• the materials (what the lens is made of)
• the lens treatments (what protects the material and optimizes its performance)

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Refractive Index: