14 October

Vision is an amazing topic. Mostly the science of it focuses (ha) on the eyes. That would seem common sense to most. The Earth being flat does to many too. In fact the obsession with the eyes and vision goes so far as to make a lot of the research on eyes dependent on actually strapping people down to tables, so instruments can prod and study the eyes alone. Here's just one peculiar, common idea about vision. That an image falls onto our retina, as in the picture. How does an image travel through the air? Anybody ever seen an image flying through the air?