My objective is to help you get the best results from your eyelash products, whether it is the ones we have reviewed above or something you find yourself!
Let me first clarify something that might confuse you. The "closing" and "opening" of your eyelashes (called an eyelash line) isn't very visible when they are closed, but when your eyelashes are open, it can be. If your eyelashes are longer, and if they are not very curled, then the "closing" line can look like a line, but the "opening" line is more apparent. But if you know your own eyelash lengths and how long your lashes are, you will know which eyelashes are the "closing" and which are the "opening."
Some products are better for closing eyelashes than others. It really depends on the person, but in general, mascara, mascara with a lot of clump-forming ingredients, and eye make up with a heavy eye color is better for closing your lashes. You may want to use products that don't clump, because your lashes are still open, but you don't want to have to re-apply mascara.
There are many types of eyelash curlers on the market, and they each have different "closing" and "opening" properties.