1. A method of displaying information about a physiological feature of a first area of the skin of a subject, the method comprising: a) resolving light reflected from the first area of the skin into a plurality of component spectral bands using a hyperspectral imaging device; b) constructing a spectral image based on the plurality of component spectral bands, the constructed spectral image including a topological or contour map representing at least a first spectral property corresponding to the physiological feature of the first area of skin, the spectral property determined from the resolved component spectral bands of the first area of the skin, wherein the topological or contour map comprises a plurality of positions each having a light intensity or color that quantitatively represents the at least first spectral property; and c) projecting an image onto the skin of the subject, the image including a first portion comprising the spectral image and a second portion comprising a legend that facilitates interpretation of the light intensity or color quantitatively representing the at least first spectral property of the physiological feature, wherein the first portion of the image is projected onto the first area of the skin of the subject and the second portion of the image is projected onto an area adjacent to the first area of the skin of the subject.