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하루에 6회 이상은 안되는군요
Artificial tears are a helpful product for dry eye syndrome. While some people use non-single-use eye drops, it is important to adhere to the proper expiration date, as using old drops after opening increases the risk of infection. Additionally, it is recommended not to use artificial tears containing preservatives more than six times a day. However, preservative-free single-use artificial tears can be used without any frequency restrictions.