Device for shielding human skin from ambient light to facilitate tests performed thereon

DETAILED DESCRIPTION I claim: 1.
A device for shielding a portion of the skin of a human patient to facilitate the performance of tests on the skin via a testing instrument, said device comprising: a first layer having a bottom surface and a top surface, said bottom surface having an adhesive layer thereon for adhesion to the skin of the human on which the test is to be performed, said first layer having an opening therethrough to permit selective access by said testing instrument to the portion of the skin exposed by said opening; a second, opaque layer positioned above said top surface of said first layer covering said opening and being secured thereto by a hinge means for permitting selective and repeated removal of at least a portion of said second layer from the area of said opening to permit periodic access by said testing instrument; and an adhesive coating between said first and second layers, said adhesive coating being effective to adhere said second layer to said first layer despite repeated removals for purposes of testing, said adhesive coating further having adhesive qualities which permit said second layer to be selectively removed from said first layer without removing said first layer from the skin of said patient.
2.
The device of claim 21 wherein said second layer is constructed of a material which allows the skin exposed by said opening to breathe in a normal fashion.
3.
The device of claim 1 wherein the top surface of said first layer is provided with said adhesive coating.
4.
The device of claim 1 wherein said first layer is generally doughnut shaped.
5.
The device of claim 4 wherein the distance between the edge of said opening and the outer edge of said first layer is at least two and one half millimeters.
6.
The device of claim 1 wherein said second layer includes a tab portion to facilitate easy removal of said portion of said second layer from the area of said opening.
7.
The device of claim 1 wherein said first layer is constructed from a foam rubber material