Imagine being able to see again for the first time in 20 years. That's exactly what happened to Mark Cornell, who became legally blind after serving in the U.S. Air Force for 18 years. Watch this emotional video as he sees his friends for the first time with eSight, electronic glasses that let the legally blind see. The glasses use a camera and advanced computing to create real-time video. The video can be enhanced and magnified for people suffering from vision impairment. This new technology comes at a hefty price-tag, starting at $15,000. See if you can't spot his hilarious...