Progressives lenses are invisible (no-line) multifocals. The prescription power changes gradually from distance prescription on upper portion to reading prescription on bottom portion.It essentially performs similar to a trifocal, but with a smooth transition from distance to near.
About Polycarbonate Lenses:
Polycarbonate lenses are tough, shatter-resistant, lightweight and ideal for everyday wear.
Recommended for prescriptions of + / - 4.00 and below.
Ten times more impact resistant than plastic.
Filters 100% of UV in daylight and fluorescent lighting.
Comes with scratch resistant coating.
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