Patent ID: 6471988
Filing Date: 2002-10-29
Classification: A61F

Abstract:
A device for protecting a skin area against light when detecting and/or treating skin disorders, including application of at least one of compounds and compositions to the skin, in connection with which a photoreactive substance appears in the skin area, wherein the device comprises an opaque foil forming a cavity relative to the skin and having edges engaging the skin, the width of the edges being determined by the formula:m>&dgr;Â·ln(tÂ·I0/Ddiffused) whereinm=the width of the edge, &dgr;=the penetration depth of the light in the skin, ln=the natural logarithm, t=the time of the effect of the light, I0=the luminous intensity at the skin surface, and Ddiffused=the diffused energy dose which is allowed to reach the skin area concerned.