Millions of people will lose their sight because they overlooked a crucial eye problem. Learn about the most common causes of blindness – glaucoma, cataracts and detached retina. 

Want a behind the scenes peek at how the giant eye was constructed for this segment? Click here to watch the art department take the project from start to finish.

Click here to watch Part 2. 

Want to know how to look marvelous without splurging so much? Dr. Oz invites three beauty experts to share the smartest ways to save money while looking fabulous starting from your hair and makeup tools to the beauty products you use.