Bifocal reading glasses clear on top

Multi-focus principle: The lenses of multi-focus reading glasses have a number of different focal degree areas from top to bottom, which are generally divided into the far light area, the transition area, and the near-light area. The far light area is used to see distant objects, such as watching scenery, watching TV, etc. The transition zone is an area of gradual change in degree, which facilitates the transition between seeing far and seeing near; The near light area is used to see close objects, such as reading books, looking at mobile phones and so on. This design allows the wearer to obtain relatively clear vision at different distances, without frequent replacement of glasses.Discoloration principle: The discoloration function is achieved through the discoloration factor in the lens. In a weak light environment such as indoors, the lens remains transparent or lighter in color, which does not affect the normal visual effect; When in the outdoor UV strong environment, the color change factor will have a chemical reaction, make the lens color darker, play a role in blocking ultraviolet light, reduce glare, and protect the eyes.
Advantages:
Convenient and practical: a pair of glasses at the same time have the function of seeing far, seeing close and seeing things clearly at different distances, and can also automatically change color according to the light intensity, whether indoors or outdoors, can meet the needs of the wearer, avoiding the trouble of frequently replacing glasses with different functions.