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Polycarbonate, also known as poly,
was invented by the aerospace industry for gear used on
the Apollo space shuttle (helmet visors etc.). It is an
impact resistant material that is highly recommended for
rimless, safety glasses and sports eyewear. Poly should
not chip or shatter and is 40 times more resistant than
FDA requirements. However, once polycarbonate is
scratched it may loose its impact resistance qualities.
Poly is a flexible material that
needs a hard coat to protect it from easily scratching,
but also has a natural UV protective nature. However,
some patients may be hyper sensitive to the “chromatic
aberration” poly has when using the peripheral viewing
area (fish bowl effect). |
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