Product Description:Progressive multifocal lenses, also known as progressive lenses, as the name suggests have multiple focal points on one lens. If it is divided from the focal point, the lenses can be divided into single focus lenses, bifocal lenses, and multifocal lenses. Our most common lenses are single-focal lenses, with only one luminosity on the lenses; bifocal lenses are bifocal lenses, which were used by many elderly people to solve the problem of seeing far and near at the same time, but due to their major shortcomings and progressive multifocals With the popularity of bifocal lenses, bifocal lenses have been basically eliminated; multifocal lenses, as a milestone in the history of lens development, will also be the main direction for scientists' research and development and market popularization in the future.
Product category:
In recent years, progressive multifocal lenses have shown extremely rapid development and popularization in China. Nowadays, scientists have made corresponding research on multifocal lenses according to the eye use and physiological characteristics of people of different ages, and finally divided them into three categories:
1. Adolescent myopia control lens - used to reduce visual fatigue and control the speed of myopia development;
2. Anti-fatigue lenses for adults - used for teachers, doctors, people who use too much computer at close range, to reduce visual fatigue at work;
3. Progressive film for middle-aged and elderly people - a pair of glasses for middle-aged and elderly people to easily see farsightedness and nearsightedness.
Precautions:
1. When choosing glasses, choose a large frame. Because the lens is divided into far, middle and near areas, only a large frame can ensure a wide enough near area. It is best to use a full frame frame, because the larger the lens, the thicker the edge of the lens, and the full frame groove can cover the thickness of the edge of the lens
2. It usually takes about a week to adapt, but the length of the adaptation period varies from person to person, and you should walk slower when you are dizzy.
3. Since both sides of the lens are astigmatic disordered areas, it is difficult to see objects on both sides by turning the eyeballs through the light, and it is necessary to turn the neck and the eyeballs at the same time to see clearly.
4. When going downstairs, the glasses should be lowered as far as possible from the upper far-use area.
Main Cooperation Materials Manufacturers: CORNING, OHARA, SCHOTT, LEONI, AGC,HELLMA, NIKON,VITRON,C-LASER,ETC
Main Export Countries & Areas: Usa, Uk, Japan, Germany, Spain, France, Swiss, Korea, Russia, Pakistan, India, Portugal, Canada, New Zealand, Australia, Saudi Arab, Turkey, Finland, Poland ,etc.
Raytekoptics Extra value added services offered: 1). Optical workcraft & process solution design; 2). Rough processing raw materials; 3). Semi finishing raw materials; 4). Fabricate custom sizes and shapes; 5). Design and supply custom coatings; 6). Modify and resurface customer supplied materials; 7). Drill holes, notch glass and provide beveled substrates; 8). Precision polish optics with non-standard aspect ratios;
Payment Method: by T/T or Western Union. Delivery time: 7-10 days. Quality Warranty: Ruitaiphotoelectric(Raytekoptics) offersquality warranty for our optics products with "3R" policy. For any inferior-quality products, Ruitaiphotoelectric(Raytekoptics) is responsible for return, replacement and refund.
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