The length of time you should hold an eyelash curler depends on several factors, such as the natural texture of your lashes and the desired curl effect. Here are some general guidelines:

- Initial hold at the base: When starting to curl your lashes from the base, it's advisable to hold the eyelash curler for about 5-10 seconds. This initial hold helps to create a strong foundation for the curl and allows the lashes to take on the shape of the curler. For example, if your lashes are straight and stubborn, you might lean towards the 8-10 second range to get a more effective curl.
- Subsequent holds while moving: As you move the curler towards the tip of the lashes, you can hold it for 3-5 seconds at each position. This shorter hold is sufficient to gradually shape the lashes and create a natural-looking, graduated curl. If you hold it for too long at this stage, you risk over-curling the lashes and making them look unnatural.
- For a more intense curl: If you want a more dramatic or long-lasting curl, you can repeat the curling process. In this case, you may hold the curler for a slightly shorter time, around 3-5 seconds each time, to avoid overworking the lashes and causing damage.
It's important to note that everyone's lashes are different, so you may need to experiment to find the optimal holding time that works best for you. Additionally, be careful not to hold the curler for too long, as this can cause the lashes to become brittle and break.