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.
  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.
  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