The three major materials of optical lenses: what are the specific differences and advantages and disadvantages of the three popular optical lenses. Fitting glasses of the lens knowledge, we introduced the type of lens function, the particularity of the material slightly passed, this time we focus on the three main materials of the lens: glass lens/resin lens /PC lens.
The three major materials of optical lenses: what are the specific differences and advantages and disadvantages of the three popular optical lenses. Fitting glasses of the lens knowledge, we introduced the type of lens function, the particularity of the material slightly passed, this time we focus on the three main materials of the lens: glass lens/resin lens /PC lens.
Three material classification
Glass lenses
In the early days, the main material for lenses was optical glass. This is mainly because considering the high transmittance and clarity of optical glass lenses, the technology is relatively mature and simple. However, the biggest problem of glass lenses is safety, its impact resistance is poor, it is very easy to break, and because of its heavy material, it is uncomfortable to wear, so it is rarely used in the market at present.
The resin lenses
Resin lens is a kind of optical lens made of resin as raw material, processed, synthesized and polished by precise chemical process. At present, resin lens is the most used material. The weight of resin lens is lighter than that of optical glass lens, and the impact resistance is stronger than glass, and it is not easy to break, so it is safer to use. In terms of price, resin lenses are also more affordable. But the wear resistance of the resin lens is poor, the oxidation speed is fast, the lens surface is easier to be scratched.
The PC lenses
PC lens is a kind of lens made of polycarbonate (thermoplastic material) after heating and shaping. This kind of material it was developed from the space program, so it is also called space film or space film. PC resin is a kind of thermoplastic material with good performance, so it is more suitable for making eyeglasses. PC lens impact resistance is very good, almost not broken, very high safety. In terms of weight, it is lighter than resin lenses. But PC lens will have difficulty in processing, so the price is relatively high.
To sum up:
| Material | Advantage | Shortage |
| Glass lens | High transmittance and refractive index, wear resistance | Heavy and easy to break |
| Resin lens | Light, not easily broken, low price | It's easy to scratch |
| PC lens | Light and not easily broken | Easy to scratch and high price |
Suitable material for the elderly
The elderly presbyopia suggested to choose glass lenses or resin lenses. Generally, presbyopia is a low-degree hyperopia film, which does not require high lens weight, and the motion coefficient of the elderly is not high. Glass or super-hard resin film is more resistant to scratches, and the optical performance can also be durable.
Material suitable for adults
Resin lenses are suitable for young and middle-aged people. The selectivity of resin lens is wide, according to the refractive index distinction, functional distinction, refractive focus distinction, can meet the different needs of different people.
Suitable material for children and teenagers
Parents are advised to choose lenses made of PC tablets or Trivex materials. Compared with other lenses, these lenses are not only light in weight, but also have better impact resistance and higher safety. Not only that, PC tablets and Trivex lenses also protect your eyes from UV rays.
This kind of lens has strong toughness and is not easy to break, so it is called safety lens. At just 2 grams per cubic centimeter, it is the lightest material available for lenses. Glasses for children are not suitable for glass lenses, because children are active, and glass lenses are fragile, if broken, it may hurt the eyes.
Wrote last
Lenses of different materials have very different product characteristics. The glass sheet is heavy and has a low safety factor, but it is resistant to scratch and has a long use cycle. It is suitable for the elderly with less exercise and low degree presbyopia. Resin lens has a wide variety of functions, suitable for young people in a variety of learning and work needs; Children's lens safety, portability requirements are high, PC lens is a better choice.
Post time: Oct-03-2022