Well, there are a couple of things you need to look out when buying an eyelash curler. :D
First of all, you need to make sure that an eyelash curler has interchangeable pads. If it does=great, if it doesn’t= this can cause some serious infection if you use that curler for too long :(
Also, eyelash curler differ by the size of your lashes. If you have small eyelashes, buy something know as the “precision eyelash curlers”.
Another thing which is worth mentioning, is that when you buy an eyelash curler and use it, check to see if the curler makes your eyelashes look longer and thicker and not bent(because this can really damage your eyelashes or pull them out in longterm).
Hope this helps, and extremely sorry for not replying for such a long time,