Disadvantages of hydrogel with traditional structure

Hydrogel is a kind of traditional contact lens material, which has soft texture and strong water-locking performance. In addition, hydrogel is relatively cheap, but soft and comfortable, suitable for healthy eyes, recommended for beginners. The water content of cosmetic contact lens made of hydrogel is low, so its oxygen permeability is poor. Wearing it for a long time will cause dry eye and dry eye. Hydrogel is generally not easy to deposit, and it is easy to deposit protein and grease, and it is not easy to clean thoroughly. It is not suitable for sensitive eyes or dry eyes, and it is not suitable for long-term replacement of cosmetic contact lenses.

When using contact lenses, it is necessary to carry out eye examination and check corneal curvature according to the situation. The best hospitals have glasses, and so do the centers. Because silicon is added to the lens made of silicon hydrogel, the moisturizing effect of raw materials is better than that of ordinary lenses. It can be said that the moisturizing effect is relatively concentrated, so it is more suitable for people with dry eyes. However, the disadvantage is that the silicon hydrogel lens is harder because of the addition of the "silicon" lens, and the hydrogel material has high cost performance, which is especially suitable for people without myopia.

It has the characteristics of softness and comfort, extremely low water content and limited oxygen permeability. Suitable for people with good eyes, and cheap and easy to buy. Secondly, the nonionic material adopts hydrogel material containing NVP component, which makes the lens very thin and soft, and it is not easy to produce protein precipitation, and also improves the service life of the lens. For people with red blood, it is very suitable to use nonionic materials to match the pupils. Finally, the silicone hydrogel material has high humidity of cosmetic contact lenses, which is especially suitable for patients with dry eye, and has a good moisturizing effect, thus alleviating the symptoms of eye hypoxia fatigue.

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