I read this book in the late sixties, when some of my fellow engineers built and tested an acoustic lens for a developmental company. Born & Wolf were well-acquainted with antenna aperture theory, and were among the first to write that the human eye could resolve 5X better than aperture theory would predict. This they credited to involuntary eye movements called flicks and saccades, which when combined with the brain's ability to do signal processing, was able to produce much better resolution than would have been predicted by the diameter of the retinal rods. In many ways the book gives testimony to God's wonderful gift of vision with color, depth, clarity, and order.