Which type of glasses are used for spectacle
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3
Types of glasses
Polycarbonate.
Trivex.
High-index plastic.
Aspheric.
Photochromic.
Polarized sunglasses.
This glasses are very good.
this are lighter and thinner.
And scratch resistant.
Polycarbonate.
Trivex.
High-index plastic.
Aspheric.
Photochromic.
Polarized sunglasses.
This glasses are very good.
this are lighter and thinner.
And scratch resistant.
SMARTHERMIONEGRANGER:
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