"This is the second edition (large print version) of an encyclopedic reference work of consumer health about the adult human eye. It covers common eye complaints such as dry eye, ocular migraine, device-related eyestrain, and conjunctivitis, along with newer forms of laser eye therapy and lens implants. This second edition features a new chapter on cosmetics and the eye, along with updated content about diagnostic testing, new forms of eyeglass materials,...

The eye is one of the most remarkable achievements of evolution, evolving up to 40 times in different parts of the animal kingdom. For humans, vision is the most important sense, and much of our brains are used to process visual information.

Can you make a duck blink? Probably not. But you can try, in this irreverent and hilarious staring contest between you and a duck that never, ever blinks.