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The difference between soft contact lenses and hard contact lenses_contact lenses_

They are all contact lenses, but in fact the materials are still very different. Everyone usually wears soft contact lenses. We select the appropriate power through direct comparison, and then look at the materials and styles to buy. But now there are hard contact lenses and soft contact lenses. Many people don't know the difference between the two. Today we will briefly introduce them. 1. Contact lens materials are different. Most of the soft contact lenses we wear every day are hydrogels or silicon hydrogels. You should also know that the air permeability of silicon hydrogels is better, but the price of hydrogels is favorable. , So most of the materials of the upper contact lens are these two. However, if it is a rigid contact lens, it is actually a high-purity plastic used, so its hardness will be higher, but it can ensure very good oxygen permeability and comfortable to wear, and it can also be used for long-term wear. Second, the channels for fitting lenses are different. If you just want to buy soft contact lenses, you can purchase them directly through such a formal platform, as long as you determine your degree and then purchase it. But if you want to wear hard contact lenses, you must go to the hospital to get glasses, and you must pass a regular doctor's examination. In addition to optometry, you must also determine the state of your eyeballs. Therefore, hard contact lenses cannot be purchased casually through online channels. Must go through formal channels to be able to buy suitable contact lenses. Third, the wearing time is different. Although the same two contact lenses, it is recommended not to wear more than 8 hours a day, but generally we buy soft contact lenses every day to annual, the longer is 12 It is generally not recommended for you to wear it for 12 months, and you should change it every 9 to 10 months. However, hard eyes can generally be worn for about 2 to 3 years, so the wearing time is indeed different, and everyone should pay special attention when buying.

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