What is a common cause of eye irritation that eyelash technicians should be aware of?

The correct answer highlights an important aspect of eyelash application that can lead to eye irritation. Incorrect application of eyelashes can cause various issues, such as improper placement of extensions, which may irritate the skin and eyes. When eyelashes are not applied correctly, they can tug on natural lashes, causing discomfort or leading to allergic reactions due to the adhesive used. Furthermore, if eyelashes are too long or heavy for the natural lashes, this can exacerbate irritation, leading to a negative experience for the client.

While the other options can contribute to eye irritation in certain contexts, incorrect application directly impacts the client's immediate comfort and health during and after the procedure. Therefore, technicians need to be meticulous and well-trained in application techniques to minimize the risk of irritation. Proper education about placement, adhesion, and aftercare can help prevent situations that may lead to discomfort or potential damage to natural lashes and sensitive eye areas.