What UV400 means?

What UV400 means?

Car windscreens filter UV light, slowing and limiting the result of the lenses and making them unsuitable for driving as they could become too dark or too light for the conditions. Some manufacturers produce special photochromic lenses that adapt to the varying light conditions when driving. The lenses of polarized sunglasses reduce glare reflected at…

Bifocal Progressive Lens Means

Bifocal Progressive Lens Means

Multi-focal lenses are segmented into two categories, lined and no-line. The no-line bifocal is additionally called a ‘Progressive’ lens, meaning the prescription changes from distance to intermediate to reading as you travel down the lens’ vertical space. The lined multi-focal lenses can be either lined bifocals or lined trifocals. Some people believe you will find…