Well, I imagine the crystals can only perceive single vector values of the magnetic field at the position of the eye. Imagine each censor returning a vector def

Well, I imagine the crystals can only perceive single vector values of the magnetic field at the position of the eye. Imagine each censor returning a vector defining the magnetic field at a point on the eye. There probably wouldn't be any way to focus or change depth of perception like one could with light. You'd have to move your eyes through space to get more than a localized snapshot. But, you can probably predict what a magnetic field looks like away from the point of measurement, I.e. the eye. What is fascinating to me is that they could potentially be learning to deal with manmade magnetic fields, adapting to human culture in a possibly novel way.