Paul McCartney ... it's crazy," McCartney says in the first of six episodes. "He wore glasses and I didn't. So if we got into an argument, I would call him 'four-eyes.' Four-eyes!

Watching Sir Paul McCartney perform or speak ... faced a 20 percent increased risk of the disease. Eye yoga is perhaps the most unusual trick McCartney has used to maintain his vision.

Hollywood celebrities such as Paul McCartney and Kristin Cavallari are sharing their New Year's resolutions, which include ...