1. Glass spectacle lenses
advantage:
1. Good light transmittance.
2. The material is hard and not easy to grind.
3. The refractive index is good, it will not affect the eyes and increase the degree.
shortcoming:
1. The weight is large, and it is easy to make people who wear glasses feel uncomfortable.
2. It is not easy to process. During the grinding process, it will be broken if you are not careful.
3. It is not easy to store, because it is too easy to break.
2. Resin spectacle lenses
advantage:
1. Lightweight and beautiful.
2. Easy to process.
3. Many personalized colors can be integrated into the lens.
shortcoming:
1. It is easy to grind and wear resin lenses at most; after 2 years, it is necessary to replace them with new ones, otherwise the grinded lenses will increase the degree of the eyes.
2. The difference in refractive index will cause the degree to remain unchanged, but the feeling of seeing things is poor.
3. It is not easy to store, because the material of the resin lens is too soft, and it is afraid that it will cause wear on the lens wherever it is placed.
