Lens: A piece of glass or other transparent material with one or more curved surfaces through which objects appear clear, larger, or smaller. Usually used in glasses, cameras, telescopes, etcClassification: Lenses can be divided into the following five types according to different materials:Resin lens special lens space lens glass lens PVC lensThe index of refraction refers to the refractive index of the lens, and the higher the index, the thinner the lens. Refractive index generally: 1.49, 1.56, 1.61, 1.67, 1.74.
 BORIS OPTICAL is one of the most Potential Finished and Semi-Finished Optical Lenses factory located in Danyang City, China. It was establish in 2012 with covering 20000 spm and 150 employees. The annual production and sales of lenses are 30 million pieces, and the annual sales have exceeded 100 million for five consecutive years.Our Key & Advantage Products:Single Vision Lens:1.49;1.56;1.59;1.60;1.67;1.74Bifocal Lens: 1.49; 1.56Progressive Lens: CR-39; 1.56; 1.60Functional Lens: Blue Cut, Photochromic; Photochromic +UV420 Blue cut; Sunglasses; Polarized; PolycarbonateRX Service: Free Form; Special Coating; Special Power Range  

Lens: A piece of glass or other transparent material with one or more curved surfaces through which objects appear clear, larger, or smaller. Usually used in glasses, cameras, telescopes, etcClassification: Lenses can be divided into the following five types according to different materials:Resin lens special lens space lens glass lens PVC lensThe index of refraction refers to the refractive index of the lens, and the higher the index, the thinner the lens. Refractive index generally: 1.49, 1.56, 1.61, 1.67, 1.74.
  What Is Blue Light?Sunlight contains red, orange, yellow, green and blue light rays and many shades of each of these colors, depending on the energy and wavelength of the individual rays (also called electromagnetic radiation). Combined, this spectrum of colored light rays creates what we call "white light" or sunlight.Without getting into complicated physics, there is an inverse relationship between the wavelength of light rays and the amount of energy they contain. Light rays that have relatively long wavelengths contain less energy, and those with short wavelengths have more energy. 

Lens: A piece of glass or other transparent material with one or more curved surfaces through which objects appear clear, larger, or smaller. Usually used in glasses, cameras, telescopes, etcClassification: Lenses can be divided into the following five types according to different materials:Resin lens special lens space lens glass lens PVC lensThe index of refraction refers to the refractive index of the lens, and the higher the index, the thinner the lens. Refractive index generally: 1.49, 1.56, 1.61, 1.67, 1.74.
 BORIS OPTICAL is one of the most Potential Finished and Semi-Finished Optical Lenses factory located in Danyang City, China. It was establish in 2012 with covering 20000 spm and 150 employees. The annual production and sales of lenses are 30 million pieces, and the annual sales have exceeded 100 million for five consecutive years.Our Key & Advantage Products:Single Vision Lens:1.49;1.56;1.59;1.60;1.67;1.74Bifocal Lens: 1.49; 1.56Progressive Lens: CR-39; 1.56; 1.60Functional Lens: Blue Cut, Photochromic; Photochromic +UV420 Blue cut; Sunglasses; Polarized; PolycarbonateRX Service: Free Form; Special Coating; Special Power Range 

Lens: A piece of glass or other transparent material with one or more curved surfaces through which objects appear clear, larger, or smaller. Usually used in glasses, cameras, telescopes, etcClassification: Lenses can be divided into the following five types according to different materials:Resin lens special lens space lens glass lens PVC lensThe index of refraction refers to the refractive index of the lens, and the higher the index, the thinner the lens. Refractive index generally: 1.49, 1.56, 1.61, 1.67, 1.74.
 BORIS OPTICAL is one of the most Potential Finished and Semi-Finished Optical Lenses factory located in Danyang City, China. It was establish in 2012 with covering 20000 spm and 150 employees. The annual production and sales of lenses are 30 million pieces, and the annual sales have exceeded 100 million for five consecutive years.Our Key & Advantage Products:Single Vision Lens:1.49;1.56;1.59;1.60;1.67;1.74Bifocal Lens: 1.49; 1.56Progressive Lens: CR-39; 1.56; 1.60Functional Lens: Blue Cut, Photochromic; Photochromic +UV420 Blue cut; Sunglasses; Polarized; PolycarbonateRX Service: Free Form; Special Coating; Special Power Range  

Progressive multifocal lenses are also called progressive lenses, which have multiple focal points on one lens as the name implies. If the lens is divided from the focus, it can be divided into single focus lens, double focus lens, multi focus lens.The most common type of lens is the single-focus lens, which has only one luminosity; Bifocal lens is bifocal lens, many old people used to solve the problem of seeing far and seeing near at the same time, but because of its own major shortcomings and the popularity of progressive multi-focus, bifocal lens has been basically eliminated; As a milestone in the history of lens development, multi-focus lens will also be the main direction of research and development and market popularization in the future.Progressive lens can realize the addition of near-use positive lens through the change of the lens center line of sight, so as to solve the problem of using different lens degrees for long distance objects, medium distance objects and close objects, and reduce or compensate the use of adjusting force. It enables the wearer to realize the vision of distant, medium and close continuous images without paying too much adjustment force.

Progressive multifocal lenses are also called progressive lenses, which have multiple focal points on one lens as the name implies. If the lens is divided from the focus, it can be divided into single focus lens, double focus lens, multi focus lens.The most common type of lens is the single-focus lens, which has only one luminosity; Bifocal lens is bifocal lens, many old people used to solve the problem of seeing far and seeing near at the same time, but because of its own major shortcomings and the popularity of progressive multi-focus, bifocal lens has been basically eliminated; As a milestone in the history of lens development, multi-focus lens will also be the main direction of research and development and market popularization in the future.Progressive lens can realize the addition of near-use positive lens through the change of the lens center line of sight, so as to solve the problem of using different lens degrees for long distance objects, medium distance objects and close objects, and reduce or compensate the use of adjusting force. It enables the wearer to realize the vision of distant, medium and close continuous images without paying too much adjustment force.

Progressive multifocal lenses are also called progressive lenses, which have multiple focal points on one lens as the name implies. If the lens is divided from the focus, it can be divided into single focus lens, double focus lens, multi focus lens.The most common type of lens is the single-focus lens, which has only one luminosity; Bifocal lens is bifocal lens, many old people used to solve the problem of seeing far and seeing near at the same time, but because of its own major shortcomings and the popularity of progressive multi-focus, bifocal lens has been basically eliminated; As a milestone in the history of lens development, multi-focus lens will also be the main direction of research and development and market popularization in the future.Progressive lens can realize the addition of near-use positive lens through the change of the lens center line of sight, so as to solve the problem of using different lens degrees for long distance objects, medium distance objects and close objects, and reduce or compensate the use of adjusting force. It enables the wearer to realize the vision of distant, medium and close continuous images without paying too much adjustment force.