Which instruments are considered critical items in electrology?

Epilator needles are considered critical items in electrology because they are used to deliver the electrical current directly into the hair follicle for the purpose of hair removal. As these needles penetrate the skin, they must be sterile to prevent any risk of infection or contamination. Because they come into contact with blood and body fluids, ensuring their sterility is paramount in maintaining a safe and hygienic practice.

Other items listed, while important for overall safety and effectiveness, do not carry the same level of critical categorization. Protective eyewear, for instance, is essential for protecting both the client’s and technician's eyes from potential hazards, but it does not directly interact with the skin or penetrate body tissue. Non-sterile gloves are important for general hygiene and protecting the practitioner but, unlike epilator needles, they do not have the same direct implication for infection risk. Facial devices, while utilized in various treatments, also do not serve the same critical function as epilator needles in terms of safety and sterility in electrology procedures.