1.56 Semi Finished Progressive Photochromic Optical HMC Lens

Progressive lens provide a great solution for people who want to escape the limited correction that most lenses provide. As their name suggests, progressive lens provides clear vision not just for nea and far, but also for all distance in between without any abrupt changes or visible lines in the lens.

Lenses photochromic are popular of all-purpose, indoor & outdoor day to day activities. Photochromic lenses are Light-adaptive and can be placed in just about any fashion frame. Photochromic lenses are faster darkening in about one minute, yet they clear indoors immediately in comparison to ordinary plastic.

Progressive lenses are developed on the basis of bifocal lenses. The use rate in Europe and the United States is relatively high, and the time of matching in China has only begun in nearly 10 years. Progressive lens refers to the gradual transition between the two focal lengths by using polishing technology in the transition between the upper and lower focal lengths, which is called progressive lens. It can be said that progressive lens is a multi-focal lens. When the wearer observes the far/near objects, in addition to not having to remove the glasses, the movement of vision between the upper and lower focal lengths is also gradual. There is no sense of fatigue that the eye must constantly adjust the focal length when using the dual-focus type, and there is no obvious dividing line between the two focal lengths. The only disadvantage is that there are interference areas of different degrees on both sides of the progressive film, which will make the surrounding field of vision produce swimming sensation.