Fitzpatrick classification of skin is the classification of skin color into types I-VI according to the characteristics of the reaction to burns or tanning after sun exposure:
Type I: White; very fair; red or blond hair; blue eyes; freckles
Type II: White; fair; red or blond hair, blue, hazel, or green eyes
Type III: Cream white; fair with any eye or hair color; very common
Type IV: Brown; typical Mediterranean Caucasians, Indian/ Asian skin types
Type V: Dark brown, mid-eastern skin types
Type VI: Black
It is generally believed that European and American people have less melanin content in the basal layer of skin, and the skin belongs to types I and II; yellow skin in Southeast Asia is type III, IV, and the content of melanin in the basal layer of the skin is moderate; African brown-black skin is type V, VI, and the content of melanin in the basal layer of the skin is very high.
For skin laser and photon treatment, the target chromophore is melanin, and the machine and treatment parameters should be selected according to the skin type.
Skin type is an important theoretical basis for the algorithm of skin analyzer. In theory, people with different skin colors need to use different algorithms when detecting the problem of pigmentation, which can eliminate the difference in results caused by different skin colors as much as possible.
However, the current facial skin analysis machine on the market have certain technical problems for the detection of black and dark brown skin, because the UV light used to detect pigmentation is almost completely absorbed by the eumelanin on the skin surface. Without reflection, skin analyser cannot capture reflected light waves, and therefore cannot detect skin discoloration.
Post time: Feb-21-2022
