Hi Ida,
Thank you for your question! The Nanolash Eyelash Serum is meant to be applied at the base of the lashes, as close to the lash line as possible, but not directly into the eye. A small amount usually does not cause harm, but it is not recommended for the product to get into the eye.
We recommend applying the serum in a very thin layer at a time and a little further away from the waterline, so it stays securely at the base of the lashes and does not run into the eye. This way, you will achieve the best results and the application will feel more comfortable.
If you notice irritation, stinging, or other symptoms in the future, you should discontinue use and contact a doctor if necessary.
Have a lovely day! 🌸