What kind of lenses are good for your eyes?

The eyes are the most vulnerable sensory organ of the human body and are also the part that is most prone to excessive fatigue. Excessive eye fatigue can easily lead to myopia and other conditions. At this time, vision will be greatly affected. The solution is to wear glasses. The quality of glasses can be good or bad. So, what kind of lenses are good for the eyes? Let’s take a look at the detailed answer below.

There are two main types of lens materials on the market, one is glass material and the other is resin material. Resin materials are divided into CR-39 and polycarbonate (PC material). Their characteristics are as follows:

1. Glass lenses are hard but not tough, and are easily broken when impacted. It has high transparency and the light transmittance is 92%. It is chemically and physically stable, resistant to the influence of various weather conditions, and does not stain or fade. It is heavy, so it is not suitable for teenagers.

2. Resin lenses are made by the reaction of diethylene glycol and propylene glycol. It is light in weight, resistant to impact, resistant to high temperatures, has good light transmittance, is close to the performance of glass lenses, and can block ultraviolet rays.

3. PC lenses, also known as space lenses or cosmic lenses, are made of optical-grade PC materials through injection molding. It has the advantages of light weight, high impact resistance, good weather resistance, good light transmittance, 100% absorption of ultraviolet rays, non-toxicity, and environmental protection, and has broad development prospects.

4. Which type of lenses are best for school-age children? School-age children are characterized by being lively and active. Children who wear glasses are prone to losing their glasses and breaking the lenses while playing. Furthermore, the lenses can easily break during the chase, causing eye and facial injuries. Therefore, when choosing lenses for school-age children, they must consider the safety of the lenses. At present, the most impact-resistant lens is PC lens, which is 12 times more impact-resistant than resin lens. It can 100% prevent ultraviolet rays and is lightweight, making it an ideal lens for school-age children.