What is a patch test typically used for in eyelash extension application?

A patch test is an important step in the eyelash extension application process, primarily used to assess a client's potential allergic reactions to the adhesives utilized during the procedure. This precaution helps ensure the safety and comfort of the client, as some individuals may have sensitivities or allergies to specific chemicals found in lash adhesives. Performing a patch test involves applying a small amount of the adhesive on a discreet area, allowing the technician to monitor for any adverse reactions, such as redness, swelling, or itching.

While determining the length of extensions needed, evaluating client satisfaction, or assessing the strength of natural lashes are all important aspects of the overall eyelash extension application process, they do not specifically relate to the purpose of a patch test. The primary focus of a patch test is to safeguard the client from potential allergic reactions, making it a crucial practice in the application of eyelash extensions.