1. A system for analyzing physical conditions associated with a subject, comprising: an image acquisition device including: at least one UV light source for illuminating the subject; at least one white light source for illuminating the subject; an optical assembly comprising a lens; and a frusto-conical source light shield extending outwardly from the lens of the optical assembly; wherein said at least one white light source has a ring-shaped configuration and is positioned behind the source light shield, said device configured to acquire a first white-light image and a first UV image of a physical feature of the subject, each of the first white-light and UV images having a plurality of pixels, each pixel in the first UV image corresponding to a respective pixel in the first white-light image; a computer system configured to identify, on a pixel by pixel basis, feature pixels in the first white-light and UV images, and to obtain results associated with at least one physical condition using information in the feature pixels in the first white light and UV images, wherein at least one of said UV and white light sources comprises at least one LED light source.