Hi dear, please do not worry. The vinegar will not cause damage on your eyes. However, it will cause uncomfortable feelings. The acetic acid in the vinegar is the main reason. However, it is a kind of cooking flavor. So if you suddenly get it into your eyes. Firstly, please do not worry about it. Secondly, please do some things immediately, such like rinse your eyes with clean water. Please do it repeated until you feel better. Please do not use any cloth to touch your eyes. In the mean time, please ask help from doctor.