Fitzpatrick Scale
A six-point numerical classification system that categorises human skin types by their response to ultraviolet radiation, from Type I (always burns, never tans) to Type VI (never burns, deeply pigmented).
Full Definition
Developed by dermatologist Thomas B. Fitzpatrick in 1975, the Fitzpatrick Scale (also called the Fitzpatrick Skin Phototype or FSP) provides a standardized framework for describing how different skin tones react to UV exposure. Types I–II represent fair, burn-prone skin; Types III–IV represent intermediate skin; and Types V–VI represent darker, burn-resistant skin. The scale is widely used in clinical studies, laser and phototherapy protocols, and sunscreen research. Editors should capitalise 'Fitzpatrick Scale' and 'Fitzpatrick Type' when used as a proper noun classification, and should render phototype numerals as Roman numerals (e.g., Type III, not Type 3).
Usage
Usage note: Roman numerals (I–VI) are the standard notation for phototypes. Capitalise 'Fitzpatrick' as it is an eponymous proper noun. 'FSP' is acceptable on second reference in technical documents.
In Context
- "Participants were stratified by Fitzpatrick Type at enrollment, with Types III–V forming the majority cohort." — Clinical study demographics section
- "Laser parameters must be adjusted for patients with Fitzpatrick Type V or VI skin to minimize dyspigmentation risk." — Treatment protocol document