Are crystal glasses good for your eyes?

Whether a pair of glasses is good or not depends on the quality of the lenses and the frame. The former is mainly distinguished by the material. Lenses made of good materials can not only allow people to see more clearly, but are also durable. The latter is mainly judged by its sturdiness. If the material is not good, the glasses frame will be particularly easy to deform. So, are crystal glasses good for your eyes?

As an optical material, the biggest advantage of crystal is its high hardness, and the lenses made from it are not easily worn. It was popular in the 1920s and 1930s. Because the lenses made from them are very durable and very expensive, they are often passed down to the next generation. There is a saying among the people: "Crystal is good for the eyes."

The main component of crystal is SiO2, which is a natural transparent mineral.

The absorption rate of crystal to ultraviolet rays is only 14.5%, while the absorption rate of glass to ultraviolet rays is 52%. Currently, the absorption rate of resin lenses with UV materials added to them has reached over 90%.

The damage that ultraviolet light can cause to the human eye is well known. Ultraviolet rays are the main cause of senile cataracts, and they will definitely damage the cornea and retina. It is reported that the damage caused by UV rays to the eyes is cumulative, so preventing UV damage is important for everyone at all times.

In addition, natural crystals often contain impurities and have uneven density, which can cause bubbles and streaks and produce double refraction, thus affecting vision.

It can be seen from this that crystal not only has no effect on nourishing the eyes, but its high transmittance to ultraviolet rays is harmful to the eyes. With the rapid development of science and technology today, lenses made of new optical material resin are far superior to crystal in terms of optical performance, safety performance, and ability to protect the eyes from harmful rays.

So you don't have to be superstitious about crystal lenses.