Regeln » mmercialized in the 1970s,

Eyeglasses are normally composed of lenses and a frame. Eyeglasses Fraser MI lenses are used mainly for vision correction Brady Skjei Rangers Jersey , ocular correction and eye protection. Optical lenses utilize the refraction and reflection of light to correct vision. The optical system of eyeglass lenses and the optical system of eyes are positioned and configured so that they function as one optical system, by holding the eyeglass lenses in a frame. Eyeglass lenses have a long history. They were first used in Medieval Europe. Lens materials, designing and surface treatment technologies arc key technologies for production of eyeglass lenses. Lens materials are made of glass or plastics. In terms of design, they are classified into single focus lenses, multifocal lenses and progressive power lenses. Surface treatment is performed to prevent reflection and improve abrasion resistance. In Japan, anti-reflective (AR) coaled eyeglass lenses, which were commercialized in the 1970s, have more than an 80% market share. Additional functionality (water-repellent properties, abrasion resistance, etc.) of the lenses is expected to continue. Requirements for eyeglass lenses will continue to be strict but become more diversified. Demands for low-price lenses are also expected to increase. Eyeglass lenses are optical lenses that will continue to play very important roles in vision care.

Eyeglasses are normally composed of lenses and a frame. Eyeglass lenses have been used mainly for vision correction, ocular correction and eye protection, etc. Eyeglass lenses are optical lenses that lake advantage of refraction and reflection of light. They are used mainly for vision correction ocular correction and eye protection. The functions arc realized with a combination of elemental technologies involving designs, materials, surface treatments (including anti-reflection films), etc. They are shaped to fit into frames, which are manufactured in consideration for fashion, etc. All required performance is contained in each of the lense