1.56 Semi Finished Blue Cut Bifocal optical lenses

Short Description:

Bifocal lenses or bifocal lenses are lenses that contain two correction areas at the same time and are mainly used to correct presbyopia. The far area corrected by the bifocal lens is called the far area, and the near area is called the near area and the reading area. Usually, the distal region is large, so it is also called the main film, and the proximal region is small, so it is called the sub-film.

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Product Detail

Product Tags

Production Details

Place of Origin:	Jiangsu	Brand Name:	BORIS
Model Number:	Blue Cut lens	Lenses Material:	CW-55
Vision Effect:	Bifocal Lens	Coating Film:	UC/HC/HMC/SHMC
Lenses Color:	White	Coating Color:	Green/Blue
Index:	1.56	Specific Gravity:	1.28
Certification:	CE/ISO9001	Abbe Value:	38
Diameter:	75/70mm	Design:	Crossbows and others

Advantages of bifocals: YOU can see distant objects clearly through the far area of a pair of lenses, and you can see close objects clearly through the near area of the same pair of lenses. No need to carry around two pairs of glasses, no need to switch between distant and near glasses frequently.

Production Introduction

Blue light is an important part of visible light. There is no single white light in nature. Blue light is mixed with green light and red light to produce white light. Green light and red light have less energy, less eye stimulation, blue light wave is short, high energy, easy to damage the eyes.

Anti-blue light lens mainly refers to the lens that can prevent blue light from irritating eyes, effectively isolate ultraviolet radiation and filter harmful blue light. Blue light is part of the natural visible light because it has a relatively short wavelength and relatively high energy. Macular disease can occur if too much blue light enters the retina, especially if it reaches the macular area of the eye. If the lens absorbs harmful blue light, it can also lead to opacities and cataracts.