-
1.71 Single Vision HMC Optical lenses
1.71 lens Full name 1.71 refractive index lens, with high refractive index, high transmittance, high Abbe number characteristics, in the case of the same myopia degree, can significantly reduce the thickness of the lens, reduce the quality of the lens, at the same time, make the lens more pure and bright, not easy to disperse rainbow grain. It is found that adding cyclic sulfide resin into the lens material can improve the refractive index of the lens, but too much cyclic sulfide resin will lead to the reduction of light transmittance and material cracking. By precisely controlling the content of ring sulphur resin in 1.71KR resin, the 1.71 lens achieves high refractive index and abbe number while ensuring good light transmittance, low dispersion and clearer vision.
-
1.56 Single Vision HMC
Lens, lens is also called mirror center, is the painting center after mounting, suitable for clamping in the mirror frame, so it is called mirror center. Its form can be horizontal, vertical, is a simple, convenient installation.
Classification: Lenses can be divided into the following four types according to different materials:
Resin lens special lens space lens glass lens
-
1.49 Single Vision UC
The refractive index of the lens, 1.49, 1.56, 1.60, 1.67, 1.71, 1.74 on the upper mark of the lens refers to the refractive index of the lens. For myopic glasses, the higher the refractive index of the lens, the thinner the edge of the lens, on the premise that other parameters are the same.
-
CR39 Sunglasses lenses
Sunglasses are a kind of vision care products to prevent the damage to human eyes caused by strong sunlight. With the improvement of people’s material and cultural level, sunglasses can be used as special accessories for beauty or personal style.
-
1.74 MR-174 FSV High Index HMC optical lenses
Generally,when we talk the index of resin lens, it’s from 1.49 – 1.56 – 1.61 – 1.67 – 1.71 – 1.74. So the same power, 1.74 is the thinnest, the higher the power, the more obvious the effect.
-
1.67 MR-7 FSV High Index HMC optical lenses
1.67 index lens usually has two kinds materials,MR-7 material and MR-10 material.
But MR-7 material is the more widely used and best known material than MR-10 material.
-
1.61 MR-8 FSV High Index HMC optical lenses
1.61 index lens usually separate two kinds,1.61 MR-8 lens and 1.61 Acrylic lens.
1.61 MR-8 lens will be more comfortable when wearing,because of its good Abbe Value:41.
-
1.59 Polycarbonate HMC Optical lenses
General resin lenses are thermal solid materials, that is, the raw materials are liquid, and solid lenses are formed after heating. PC lenses, also known as “space lenses”, “cosmic lenses”, chemically called polycarbonate, is a thermoplastic material.
-
1.56 Bifocal Flat top / Round Top / Blended HMC optical lenses
Bifocals Lenses are spectacle lenses that contain both correction zones and are primarily used for presbyopia correction. The area where bifocals correct far vision is called far vision area, and the area that corrects near vision area is called near vision area and reading area. Usually, the far area is larger, so it is also called the main slice, and the near area is smaller, called the sub slice.
-
1.56 Porgressive HMC optical lenses
Progressive lens is a multi-focal length lens, different from traditional reading glasses and bifocal reading glasses. Progressive lenses do not have the fatigue of eyeballs having to constantly adjust the focal length when using bifocal lengths, and there is no obvious line between the two focal lengths. demarcation line. It is comfortable to wear and has a beautiful appearance, and has gradually become the best choice for people with presbyopia.
