Cheap price Photochromic Specs - 1.56 Bifocal Flat Top Photochromic Gray HMC Optical lenses – Boris

Production Details

A bifocal lens

Features: Two focal points in a pair of lenses, and a small lens superimposed on a normal lens; For presbyopia patients to see far and near the use of alternating; The upper is the distance luminosity (sometimes flat), the lower is the reading luminosity; The distance degree is called the upper light, the near degree is called the lower light, the difference between the upper and lower luminosity is add (external luminosity);

Advantages: The presbyopia patients do not have to change glasses when looking near and far.

Production Introduction

Product Process

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