You might however want to check your insurance before using lances on clients though. Even Habia don't advise the use of lances around the eye area, which after all is one of the most common places to find them. Electrolysis on the other hand can safely be used round the delicate eye area.
Habia guidelines:
It is common practice for a trained beauty therapist with Level 3 Beauty Therapy qualification (or equivalent) to remove milia with a disposable/sterile micro lance (also used for the removal of ingrown hairs). It is standard procedure in a facial to remove a small number of milia, if evident. However, if there are lots of milia around the delicate eye area, it is advisable to refer the client to the doctor, so that they can be surgically removed under anaesthetic.