Why did resin lenses replace glass lenses?

Glass lenses are the earliest lenses, but with the development of technology and the improvement of people's material living standards, the status of glass lenses is gradually replaced by resin lenses.

Now there are fewer and fewer glass lenses on the market, and resin lenses have become the main choice for people who wear glasses.

What are the advantages of resin lenses over glass lenses? Let's first take a look at the characteristics of glass lenses and resin lenses.

Features of glass lenses

1. High hardness, the lens is not easy to scratch, but it has no toughness and is easy to break when it is hit.

2. High transparency, light transmittance is 92%.

3. It has stable chemical properties, can resist the influence of various bad weather, and does not color or fade.

4. The weight is heavy, not suitable for young people to wear.

Features of resin lenses

1. The refractive index of the resin lens is lower than that of the general glass lens, so the resin lens of the same degree is thicker.

2. The dispersion properties of resin lenses and ordinary glass lenses are very similar, and the perspective rate is more than 2% higher than that of ordinary glass lenses.

3. Because the resin lens has higher light transmittance and lower refractive index, its surface reflection is lower than that of ordinary glass lenses, and it is not dazzling.

4. Resin lenses are easy to dye, and can be dyed into colored lenses with different transmittances as needed.

5. The resin lens is light in texture, its weight is only half of the general glass lens, and the resin lens has a strong impact resistance.

6. The optical properties of the resin lens are extremely stable and will not change in high or low temperature.

7. The resin lens is more convenient and easier to assemble and process.

After comparison, we can easily find that the wearing comfort and safety of resin lenses are much better than glass lenses. So slowly replaced the status of glass lenses.

But there are exceptions.

Some people with strong sensitivity are accustomed to glass lenses. If they choose resin lenses of average quality, they will feel that they are not as comfortable as glass lenses, and even suffer from visual fatigue. In addition, people with higher refractive errors will be more comfortable wearing glass lenses than resin lenses.

In general, the comprehensive performance of resin lenses is still stronger than that of glass lenses.