[Noninvasive diagnosis of skin functions].

Noninvasive investigation of skin functions is increasingly employed in dermatology and cosmetology. It enables one to study aspects of skin functions that cannot always be appreciated by sensory perception. Noninvasive methods permit objective and reproducible investigation of distinct biophysical parameters. In the age of evidence-based medicine this becomes more and more important. Biophysical data can be quantified, analyzed, and stored electronically. In an overview, selected noninvasive techniques of skin function testing are introduced and their relevance in dermatology, dermatopharmacology, and cosmetology is discussed.