Current research deals with the problem of optical clearing during photometry by ellipsoidal reflectors. The specific problem is optical clearing of human skin, specifically the level control tasks during non-invasive conditions of experiment. In silico experiment involve Monte Carlo simulation of light propagation in multi-layered biological tissue and ellipsoidal reflector. The research was made for the set of human skin layers optical properties and their anatomic thicknesses. There were received photometric images in back scattered light for human skin from following parts of body: palm (hand), chest, abdomen, shoulder, back and thigh. Based on the zone analysis there were received illuminance dependencies of middle and external rings of photometric images from the optical clearing time. In addition, there was investigated the influence of optical clearing time on the character of light scattering on human skin from different parts of human body. Ref. 45, fig. 5, tabl. 2.