After losing his sight to cancer at age two, Ben Underwood taught himself to "see" using echolocation. By making a clicking sound and then listening to how the sound bounced off nearby objects, Underwood was able to determining the location and distance of surrounding items. Using this method, Underwood was able to successfully walk around without using a cane, not to mention ride a bicycle, rollerblade, swim, play basketball and practice karate. Underwood died of cancer in January of 2009, at the age of 16.AJC.com: Blind teen with remarkable 'echolocation' skills dies at 16 (January 22, 2009)

"Ben was perhaps the most inspirational patient I've seen in more than 20 years in medicine."—Pediatric eye surgeon James RubenAJC.com: Blind teen with remarkable 'echolocation' skills dies at 16 (January 22, 2009)

"One thing that I truly get back from Ben being blind is that he truly sees people from within. When he hears someone say that someone else is ugly, or anything negative towards someone else. He says, 'That's whats wrong with sighted people, you all look at one another and judge what you look like.'"—Ben Underwood's mother, Aquanetta GordonBenUnderwood.com: About