The Emergence of a Fovea While Learning to Attend (2017)

One parameter of interest in visual neuroscience is the retinal sampling lattice which defines the relative positions of the array of ganglion cells in our eyes. (Left) Our model retinal sampling lattice attending to different parts of a simple scene. For example, we can give our model the ability to zoom in and out of an image by rescaling the entire grid to cover a smaller or larger area:

Retinal sampling lattice which also has the ability to rescale itself.

Source: bair.berkeley.edu