What a bad signal from this strange device

We are acquainted to a description of the eye as a good camera with clearly determined optical and spectral properties. Reality is not exactly like that. This presentation aims at reviewing the many peculiar characteristics that sometime are not considered in the process of modeling our human vision system. One can be tempted of simplifying or of considering our vision system as a black box that we can describe from a top-down point of view, following the habit of using more engineering than biological descriptions. This talk want to suggest that within the unusual property of our eye it can be hidden the key of interpretation of the inner mechanisms of our vision.