Wgtd's The Morning Show With Greg Berg

We speak with David King Dunaway about his new book "A Four-Eyed World: How Glasses Changed the Way We See." It's a look at the history of how eyeglasses were developed - and what may be ahead as technology advances. The book also touches on the author's own relationship with glasses- which he has worn for more than 70 years. During the course of researching this book, the author elected to spend a week without wearing his glasses to see how well he could navigate with his very serious myopia uncorrected.