Yes, generally speaking, fake eye lashes are very bad for your eyes. In some cases, it can lead to some serious eye diseases, such as the eye infection. first, you should know that this fake eyelashes are applied to the eyelid and then removed after usage, and eyelash extensions are applied directly to the natural eyelash with a bonding agent .but you should know that these bonding agents and glues are made of chemicals, so they can be irritants and can cause discomfort and potential eye damage in severe cases. If you keep using eyelash, of course, it can cause eye infection in your eyes, for your eyes have been invaded by some bacteria. In some serious cases, when you have pink eyes, it will weaken your eyes, and lead to some other eye diseases, such as the pink eyes, and dry eyes. So anyway, you should pay more attention to it. And do not use fake eyelashes too often.