The superior colliculus is an important structure in the visuomotor pathway of mammals, that is known to be deeply involved in visual saccadic behavior. We present a model of this structure based on biological data, the specificity of which is related to the homogeneity of the underlying substratum of computation. This makes it more suitable to process massive visual flows on a distributed architecture, as it could be requested in a realistic task in autonomous robotics. The model presented here is embedded in the exogenous part of the visual pathway, from the retina to the superior colliculus.