Technology
Excimer
Vitiligo and psoriasis
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The Excimer system delivers a focused 308nm UVB beam directly to affected patches of skin. In vitiligo, the wavelength stimulates the remaining melanocytes in and around the patch to migrate and produce pigment. In psoriasis, it dampens the overactive immune response driving the plaque. Because the beam is aimed only at affected skin, healthy surrounding areas receive no exposure, and each pulse lasts only seconds. Sessions themselves are short, usually a few minutes total, and are given two or three times a week. Response is assessed over a course of visits.