The resin for myopia lenses is still optical???

First of all, let's talk about the advantages and disadvantages of resin sheets.

Advantages of resin sheet: light weight, not broken, impact resistance, low hardness, easy to be grinded.

Disadvantages of resin sheet: thicker than glass sheet of the same degree, not resistant to high temperature, low density, easy to yellow, high refractive index lens**.

Advantages of glass sheets: better light transmittance, up to more than 99%, high density, the lens is much thinner than the resin sheet of the same degree, the lens is not easy to yellowing after a long time, the service life is relatively long, cheap, the hardness is higher, and it is not suitable for grinding.

Disadvantages of glass sheets: fragile, heavier than resin sheets, if your degree is not high about 300 degrees, then glass sheets and resin sheets can be selected. It's just that the glass ones will be heavier, the lenses are fragile, and the glass ones can't be made into rimless and half-rimmed glasses, so they can only be selected in the whole frame.

If it is mixed with resin, it will be much lighter than the glass sheet, and the thickness will be slightly thicker. There is no restriction on the frame of the resin lens, and the frameless half frame and full frame can be selected.

If you have a power of more than 6, you can still choose plastic lenses, but you should choose lenses with a high refractive index, which will look thinner than ordinary resin lenses. But it's also a little bit higher. The glass one can only be equipped with a full frame, and the weight will be a little heavier.

If it is more than 1,000 degrees, then I still recommend you to use a glass sheet, because the difference between the thickness of the glass and the thickness of the resin sheet is very obvious. If you use resin sheets, you can't say that it's thick...

I don't say what lenses are good or what lenses are not, the key is to see which aspect you pay attention to. However, now that resin lenses account for more than 95% of the market, glass lenses are becoming more and more difficult to buy. Now resin sheets are already the mainstream. The days of glass are over...

In terms of material, the optical effect of glass is better than that of resin, but the glass is easy to be damaged and broken, and glass sheets have been banned in some places abroad, and the resin sheets are very lightweight, if the film is added, it can also prevent radiation, but the weakness is that it is easy to scratch, so it needs to be well maintained, and it is best to rinse it with water before wiping.

Plastic lenses are expensive because they are a kind of pure natural plant synthesis, which is less harmful to the human body and more environmentally friendly than glass lens glasses. Consumers are also more inclined to choose plastic glasses, which are more expensive for these two reasons. I think resin glasses are better than glass glasses.

Let's take a look at this problem**, I hope these contents can help friends in need.

1. What are the characteristics of plastic lenses?

Plastic lenses are made by the reaction polymerization of diethylene glycol and propenol esters. Compared with glass lenses, plastic lenses have the characteristics of light weight, good impact resistance, high temperature resistance and good light transmittance. In addition to its own characteristics, it also takes into account the performance of glass lenses, blocks ultraviolet rays, and can also choose colors according to consumer preferences, customized according to individual needs.

Plastic lenses are softer than glass lenses, when we wear resin eyes, we should pay attention to resin lenses do not touch hard objects, when cleaning plastic lenses, we should use water to clean the dust particles on the lenses, you can also use a small amount of detergent to clean. Finally, choose to wipe it with a special glasses cloth for plastic lenses, and if the plastic lenses are still oily, you can go to the optical store to clean them thoroughly.

IIWhat are the advantages and disadvantages of plastic lenses?

The advantages of plastic lenses are: thermal expansion coefficient, thermoplasticity, shrinkage, curvature, optical transparency, water absorption, optical stability and other properties. Plastic lenses are the biggest advantage of all lenses in terms of impact resistance and weight, so they are relatively light to wear and there is no need to worry about the glasses breaking.

The disadvantages of plastic lenses are: poor abrasion resistance, easy to wear or scratch. The refractive index of ordinary plastic lenses is lower than that of glass lenses, so ordinary fiber lenses of the same power will be thicker than glass lenses. Pay attention to maintenance during wearing plastic lenses to prevent scratches.

Compared with glass lenses, plastic lenses are more durable and less prone to wear and tear. Therefore, it will be a little higher than glass lenses.

Because of the plastic lens, it is relatively light and thin, so it is relatively expensive to refine, and the glass lens is a little better than the plastic lens.

Glass lenses are optical glass, and resin lenses are an organic material. Plastic lenses are light, impact-resistant, and the visible light area is close to glass, while the invisible light area has poor light transmittance, low cost, and easy processing, compared to glass lenses.

Plastic lenses. It is an optical lens made of resin. There are many kinds of materials, which have their own unique advantages compared to glass lenses:

1. Light. Generally plastic lenses are, while optical glass.

2. Impact resistance.

Strong. The impact resistance of plastic lenses is generally 8 10kg cm2, which is several times that of glass, so it is not easy to break, safe and durable.

3. Good light transmittance. in visible light.

area, the light transmittance of the resin lens.

Similar to glass; Infrared light.

zone, slightly higher than glass; In the ultraviolet region, starting from 0 4um, the light transmittance decreases with the decrease of wavelength, and the light with a wavelength less than 0 3um is almost completely absorbed.

4. Low cost. Injection-molded lenses can be mass-produced by manufacturing a single precision mold, saving processing costs and time.

5. Able to meet special needs. Such as aspherical lenses.

It is not difficult to make, but glass lenses are very difficult to do.

Spectacle lenses can be divided into two main categories, namely glass lenses and optical resin lenses.

Glass lenses include optical glass lenses and high refractive index lenses (commonly known as ultra-thin sheets), which have high hardness and good wear resistance, and generally their quality and various parameters will not change over time, but the impact resistance and weight of glass lenses are slightly inferior to those of plastic lenses.

Plastic lenses are generally much lighter than glass lenses and have better impact resistance than glass lenses, but their surface hardness is lower and they are more susceptible to abrasion. Due to the soft characteristics of plastic lenses and coated lenses, you should be careful not to let the mirror surface directly contact hard objects, and it is best to wash with water (or mixed with a small amount of dish soap) when scrubbing, and then use a special test cloth or high-quality cotton paper to blot the water droplets on the spectacle lenses. In addition, coated lenses should be used with caution in places with poor environmental conditions to avoid contamination and difficult cleaning.

The main raw material for glass lenses is optical glass. Its refractive index is higher than that of plastic lenses, so glass lenses are thinner than tree lenses at the same power. The light transmittance and mechanical and chemical properties of glass lenses are relatively good, with a constant refractive index and stable physical and chemical properties.

Lenses without color are called optical trays (white lenses), and pink lenses in colored lenses are called Crockel lenses (red lenses). Crocksel lenses absorb ultraviolet rays and absorb bright light slightly.

The glass sheet has superior optical properties, is not easy to scratch, and has a high refractive index. The higher the refractive index, the thinner the lens. Therefore, people with high myopia of more than 1000 degrees are recommended to wear glass sheets. However, the glass is fragile and the material is on the heavy side.

Summary. Kiss! Hello, a blessing, a warmth, a touch.

Have a grateful heart. Life is full of touching! Your question has been received, it will take a little time to type, please wait a moment and please do not end the consultation.

You can also take this time to provide more effective information so that I can better answer for you. Hope mine can solve your problem and sort out the answer for you right away, please wait a moment!

Kiss! Hello, a blessing, a warmth, a touch. Have a grateful heart.

Life is full of touching! Your question has been received, it will take a little time to type, please wait a moment and please do not end the consultation. You can also take this time to provide more effective information so that I can better answer for you.

Hope mine can solve your problem and sort out the answer for you right away, please wait a moment!

Hello, I am glad to answer for you: the main materials of myopia lenses are glass and resin, of which plastic lenses are the mainstream materials. It has the characteristics of light weight and not easy to damage, but the hardness is relatively low, easy to wear, and because the refractive index is lower, the lens thickness will be thicker than the glass lens.

However, glass lenses are easy to break, and processing is difficult. Therefore, it is better to choose resin material at present.

If my answer is helpful to you, please give it a thumbs up (comment in the bottom left corner), your efforts are important to me, and your support is also my motivation for progress. If you feel that my answer is still satisfactory, you can click on my avatar for one-on-one consultation. Finally, I wish you good health and a good mood!