Most eyelash extensions applied in the salon usually last between two and four weeks. This takes into account that some eyelashes will fall out prematurely, especially in the first few days. You can take days, even weeks, off your individual lashes. I always choose individual lashes when I want to have a full lash line for several days in a row, and I can usually remove them for at least a full week before removing them.
I don't know anything about false eyelash strips, but they have these types of false eyelashes applied individually, which are actually groups of two or three eyelashes. They stand between real eyelashes to help fill them in. You can apply them yourself or do it professionally. I had them inserted for a wedding.
They're supposed to last at least a week, maybe longer, if you don't rub your eyes. Generally speaking, you can get away with wearing false eyelashes for up to five days. After that, the eyelashes will begin to lose their shape and may come off the natural eyelashes. Let's start with your natural eyelashes.
The weight of the eyelashes will tell you how long you can use false eyelashes. If your natural eyelashes are very heavy, you should not wear false eyelashes for more than a day or two. Simply use tweezers to remove the dry glue from the eyelashes after removing them and store them in their original cover until you want to use them again. Remember that your lashes may look fresh and flawless, but you'll be susceptible to irritation caused by all the glue.
The adhesive eyelash glue used to fix false eyelashes can weaken natural eyelashes if used for long periods of time. You'll definitely want to follow the instructions and let the glue stick to the false eyelashes for about 30 seconds before placing the eyelash on the eyelid. I thought that advice helped me a lot. But don't let the name confuse you, individual eyelashes are actually a group of single-eyelash hairs (about five to ten) that have stuck together.
Depending on the amount of glue you use (and how good adhesive you have), they should last until the end of the night, however, I've also been able to use them overnight. They are glued to the eyelashes with glue that is placed on a swab and the eyelash extensions are applied to the natural eyelashes. If you use too much glue, you can make your eyelashes brittle and even fall out.