Vision systems evolve over generations based on the needs of the users and the environment. In humans, evolutionary pressures led to the development of the need for clear distance visual acuity and binocular three-dimensional (3D) stereoscopic vision. These visual skills enabled us to effectively respond to threats in the environment that were distant and constantly
changing, and improved our odds of being the hunter rather than the hunted. When Johannes
Gutenberg developed the process for modern book printing in the mid 15th century, he set in motion the shift in visual demands away from the importance of seeing clearly at distance and toward
a time intensive two-dimensional near-point task such as reading....read more...