Anti-fog lenses are generally divided into long-term anti-fog lenses and short-term anti-fog lenses according to the duration of anti-fog function. Long-term anti-fog lens refers to the kind of lens that can be used continuously for several months or years and is not afraid of rubbing and washing, such as a thousand-day anti-fog lens. Short-acting anti-fog lens refers to the kind of lens that can only last for a few days or more, and is afraid of rubbing and washing. The anti-fog effect disappears completely after rubbing once or washing twice, such as instant anti-fog lens. Many anti-fog helmet lenses sold online are instant anti-fog lenses. For consumers, such anti-fog lenses have no practical value and use value, which is equivalent to ordinary lenses without anti-fog effect, which is a waste of money. Good anti-fog myopia lenses also need to go to a regular professional hospital and recommend Aier Eye Hospital.

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