Anti blue light lens, dyed lens, color changing lens, polarized lens, sun lens...... The lens on the market is multifarious, various, material and function differ, choose the lens that suits oneself to let many people make difficult. What function do these lenses have? Which groups are they applicable to? How should children and adolescents choose?
Blue light can stimulate the development of eyeballs. It is not recommended to wear anti-blue light glasses for a long time. Anti-blue light glasses can absorb or block short-wave blue light that causes retinopathy, so as to reduce the amount of blue light entering the eye and prevent retinal diseases caused by blue light. It also reduces scattering, allowing objects to appear more clearly in the retina and reducing eye strain.
But blue-blocking glasses alone can't prevent myopia, and staring at a screen for long periods of time can also cause fatigue. Moreover, blue light plays an important and positive role in the development of children's eyeballs, and a certain amount of blue light exposure is needed to stimulate the development of children and adolescents' eyeballs.
It is not recommended that children and teenagers wear colored glasses indoors. Both color-changing glasses and stained glasses can be called "sunglasses with degrees," which are common products of myopia glasses. It should be noted that the stained lenses have a certain degree, so too large frames should not be selected. Too large frames will not only cause thick lens edges and uneven staining, but also cause discomfort for the wearer.
Moreover, stained lenses can reduce the total amount of light entering the eye, affecting the transmittance of the lens. The darker the lens is, the darker the external objects are. Therefore, it is best not to wear stained glasses indoors, and it is necessary to choose dark stained lenses for outdoor wear.
Color-changing lenses are more suitable for people with lower degrees and not much difference between the two eyes. Most color changing lenses rely on the intensity of ultraviolet light to mediate the color changing process. In the outdoor, the lenses automatically adapt to uv changes, from transparent lenses quickly into dark lenses; Indoors, the intensity of uv rays diminishes and the lenses revert from dark to transparent. If the degree of myopia is too large, the lens is thin in the center, thick at the edge, light in the middle and dark around the color. Two eye degree difference is too big, about two pieces of color depth may also be different, affect beautiful. In addition, color changing glasses used for a long time, the background color will be more obvious, affecting the appearance, so it needs to be replaced every two years.
Polarized glasses and sunglasses are suitable for outdoor activities such as driving, fishing and skiing. Polarizing lens adds polarizing filter layer, can filter dazzling reflected light and scattered light, has the function of reducing glare, can effectively weaken the strong light, make the field of vision more clear. Sunglass is the eye "sunscreen", can absorb or reflex a lot of light, reduce the amount of light that enters the eye, reduce the uncomfortable feeling of the eye, the most important effect is to prevent ultraviolet ray, help the eye to reduce the happening of disease.
Post time: Jun-02-2022