What are the materials used for contacts? What are the advantages and disadvantages?

Currently on the market, there are three main materials for contacts, namely hydrogel, non-ionic and silicone hydrogel. The advantages and disadvantages of these three materials are different, the next want to give you a good introduction to it!

A hydrogel material

This is the most common pupil material, this kind of material pupil is generally softer, more comfortable to wear, but the disadvantage is that the water content of the lens is relatively low, and the performance of the anti-deposition is also relatively poor, so it's oxygen permeability is limited.

I just started to buy the pupil material is hydrogel, wear sense of general, and wear a long time the eyes will have a very obvious sense of dryness, more suitable for the eye base good treasure into, I think its biggest advantage is the price is very pro-people, generally dozens of dollars can buy a good one.

Second, the non-ionic material

Non-ionic material is in fact in the hydrogel material on the basis of adding a large number of NVP components, so the manufacture of pupils is very thin and light, and huge soft, but also not easy to produce protein precipitation, so the service life of the lens is very high.

If your eyes are more sensitive, and love red blood, then it is very suitable to start this kind of material pupil, I wear on the feeling is basically do not feel the eyes inside the pupil's existence, high comfort, the only drawback is the price is more expensive than the hydrogel material of a few tens of dollars.

Third, the silicone hydrogel material

Silicone hydrogel material can be said to be the upgraded model of the pupil, is in the hydrogel material on the basis of the addition of this component of the silicone, so that the humidity of the entire lens has become higher, so to speak, silicone hydrogel pupils focus on the effect of moisturization can effectively reduce the eye lack of oxygen, long wearing produce

This type of pupil is more suitable for eyes easy to dry treasure, the disadvantage is that the lens is more hard, not very suitable for sensitive eyes, I personally wear when I feel that the foreign body of the lens is heavier, wear not so comfortable.

The last thing I'd like to say is that I prefer non-ionic pupils, followed by hydrogel, and then silicone hydrogel. Non-ionic wear feeling is the most comfortable, but also the most no foreign body sensation, no matter what your eyes I think are very suitable, I now buy contacts are basically to buy this one.