What should be the primary consideration when applying eyelash extensions to a client?

The primary consideration when applying eyelash extensions should be the client's eyelash health. This aspect is crucial because the natural lashes must be strong and healthy enough to support the extensions without causing damage. If a client has weak, brittle, or unhealthy lashes, the weight of the extensions may lead to more significant issues such as breakage or loss of natural lashes. Assessing eyelash health allows the technician to make informed decisions regarding the type of extensions that can be safely applied and whether any precautions or preparations are necessary to protect the client's natural lashes. Prioritizing eyelash health ensures a safer procedure and optimal results for the client's overall eye aesthetics.