| 1.56 progressive optical lens | |
| Model: | 1.56 optical lens |
| Place of Origin: | Jiangsu, China |
| Brand: | SETO |
| Lenses Material: | Resin |
| Function | progressive |
| Channel | 12mm/14mm |
| Lenses Color | Clear |
| Refractive Index: | 1.56 |
| Diameter: | 70 mm |
| Abbe Value: | 34.7 |
| Specific Gravity: | 1.27 |
| Transmittance: | >97% |
| Coating Choice: | HC/HMC/SHMC |
| Coating color | Green,Blue |
| Power Range: | Sph: -2.00~+3.00 Add: +1.00~+3.00 |
1.What is progressive multifocus lens?
Between the far-light region and near light region of the same lens, the diopter changes step by step, from the far-use degree to the near-use degree, the far-light region and near light region are organically connected together, so that the different luminosity required for far-distance, medium distance and near distance can be seen on the same lens at the same time.
3. Classification of progressive multifocus lenses At present, scientists have made corresponding researches on multi-focus lenses according to the way of using eyes and physiological characteristics of people of different ages, and finally divided into three categories of lenses:
(1), Adolescent myopia control lens -- used to slow down visual fatigue and control the development rate of myopia;
(2), adult anti-fatigue lens -- used for teachers, doctors, close distance and computer users too much, to reduce the visual fatigue brought by work;
(3), Progressive tablet for middle-aged and old people -- a pair of glasses for middle-aged and old people easy far-sighted near.
4. What is the difference between HC, HMC and SHC？| Hard coating | AR coating/Hard multi coating | Super hydrophobic coating |
| make the uncoated lenses are easily subjicted andexposed to scratches | protect the lens effectively from reflection,enhance functional and charity of your vision | make the lens waterproof, antistatic, anti slip and oil resistance |
2.What are the three functional areas of progressive multifocus lens? The first functional area is located at the upper part of the lens remote area. The remote area is the degree required to see far, used to see distant objects.
The second functional area is located near the lower edge of the lens. The proximity zone is the degree required to see close, used to see objects close.
The third functional area is the middle part that connects the two, called the gradient area, which gradually and continuously transitions from the distance to the near, so that you can use it to see middle-distance objects. From the outside, progressive multifocus lenses are no different from regular lenses.
