What is the maximum depth at which surface microdermabrasion can be performed by a cosmetologist?

The correct choice indicates that surface microdermabrasion should not be performed below the stratum corneum, which is the outermost layer of the skin. Microdermabrasion is a non-invasive cosmetic procedure primarily aimed at exfoliating the surface of the skin to remove dead skin cells, improve skin texture, and promote a brighter complexion.

By limiting the depth of this procedure to the stratum corneum, cosmetologists ensure that they are working within safe parameters that minimize the risk of injury or complications. The stratum corneum acts as a protective barrier for the underlying layers of skin, and performing microdermabrasion above this layer helps maintain its integrity while still achieving the desired exfoliation effects.

This restriction is also important for adhering to state regulations and safety standards within the cosmetology profession, ensuring that treatments provided by trained professionals do not adversely affect the skin's health or overall wellbeing. Thus, keeping the procedure confined to the surface level allows for effective results while ensuring client safety.