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24871. Cr39 D Top Flat Top Bifocal Hc 70/28mm Optical Lens 
[Sep 10, 2025]
[Sep 10, 2025] What is Lens Index? The lens index refers to the index of refraction (otherwise known as refractive index) of lens material for eyewear. It is a relative measurement number that describes how efficiently the material ...
Company: Danyang Boris Optical Co., Ltd.
24872. 1.61 UC Acrylic Semi Finished Single Vision Optical Lenses Eyewear Lens Plastic Lens [Sep 10, 2025]
[Sep 10, 2025] 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, etc Classification: Lenses can ...
Company: Danyang Boris Optical Co., Ltd.
24873. 1.56 Bifocal Flat Top Photo Grey Optical Lens [Sep 10, 2025]
[Sep 10, 2025] he color lenses Color changing lens, also known as "photosensitive lens". The glass lens is added with silver halide, but at present the mainstream is resin discoloration lens, in the acrylic resin lens with the ...
Company: Danyang Boris Optical Co., Ltd.
24874. Spectacles Lens High Index 1.67 Hmc Mr-7 Asp UV400 EMI Eyeglass Optical Lenses Hot Sale [Sep 10, 2025]
[Sep 10, 2025] What is Lens Index? The lens index refers to the index of refraction (otherwise known as refractive index) of lens material for eyewear. It is a relative measurement number that describes how efficiently the material ...
Company: Danyang Boris Optical Co., Ltd.
24875. China Factory Index 1.499 Cr39 Resin Round Top Bifocal Optical Lens Uncoated Eyeglasses Lenses [Sep 10, 2025]
[Sep 10, 2025] Bifocal lens can be used to correct both far and near vision, mainly for presbyopia. The general distribution of bifocal lens is: the upper part of the lens is to see the distance, the lower part of the lens is used to ...
Company: Danyang Boris Optical Co., Ltd.
24876. Quality Optical Lens Eyeglasses Lens 1.56 Flat Top Bifocal UC Single Vision Cr 39 Lenses [Sep 10, 2025]
[Sep 10, 2025] Bifocal lens can be used to correct both far and near vision, mainly for presbyopia. The general distribution of bifocal lens is: the upper part of the lens is to see the distance, the lower part of the lens is used to ...
Company: Danyang Boris Optical Co., Ltd.
24877. High Index 1.67 Asp UV420 Blue Cut Lenses Hmc Manufacturing Ophthalmic Anti Blue Ray Lenses [Sep 10, 2025]
[Sep 10, 2025] 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 ...
Company: Danyang Boris Optical Co., Ltd.
24878. Manufacturer 1.56 Photochromic Grey Hmc Optical Lens Eyeware Lens [Sep 10, 2025]
[Sep 10, 2025] Spin coating Lens : Spin coating Lens adopts spin change technology, which completely subverts the previous basic change technology. Compared with base transformation, it is uniform and has no background color; ...
Company: Danyang Boris Optical Co., Ltd.
24879. Manufacturer 1.56 Single Vision Hmc Anti Refractive Optical Lenses [Sep 10, 2025]
[Sep 10, 2025] The surface quality film protects the lens, making it smooth and easy to wipe, making it easier to clean the lens. Lens: A piece of glass or other transparent material with one or more curved surfaces through ...
Company: Danyang Boris Optical Co., Ltd.
24880. Manufacturer 1.56 Progressive Multifocal Hmc Optical Lenses [Sep 10, 2025]
[Sep 10, 2025] 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 ...
Company: Danyang Boris Optical Co., Ltd.
24881. Supplier High Index 1.71 Asp Spin Photochromic Hmc Lens Eyeglasses Super Thin Eyeglass Lenses [Sep 10, 2025]
[Sep 10, 2025] Spin coating Lens : Spin coating Lens adopts spin change technology, which completely subverts the previous basic change technology. Compared with base transformation, it is uniform and has no background color; ...
Company: Danyang Boris Optical Co., Ltd.
24882. 1.56 Blue Cut Bifocal Flat Top Hmc Optical Lenses Spectacle Lens Hot Sale [Sep 10, 2025]
[Sep 10, 2025] Bifocal lens can be used to correct both far and near vision, mainly for presbyopia. The general distribution of bifocal lens is: the upper part of the lens is to see the distance, the lower part of the lens is used to ...
Company: Danyang Boris Optical Co., Ltd.
24883. Manufacturer 1.56 Blue Cut Anti Blue Light Blue/Green Hmc Optical Lenses [Sep 10, 2025]
[Sep 10, 2025] 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 ...
Company: Danyang Boris Optical Co., Ltd.
24884. Single Vision 1.61 Photogrey Photobrown Sv Hmc High Quality Optical Lenses Blue Cut Single Vision ... [Sep 10, 2025]
[Sep 10, 2025] Spin coating change Lens : Spin coating Lens change adopts spin change technology, which completely subverts the previous basic change technology. Compared with base transformation, it is uniform and has no background ...
Company: Danyang Boris Optical Co., Ltd.
24885. 1.49 Bifocal Flat Top Hmc Optical Lenses Spectacle Lens Good Quality Danyang Lens [Sep 10, 2025]
[Sep 10, 2025] Bifocal lens can be used to correct both far and near vision, mainly for presbyopia. The general distribution of bifocal lens is: the upper part of the lens is to see the distance, the lower part of the lens is used to ...
Company: Danyang Boris Optical Co., Ltd.
