This animation by Visible Productions explains the process by which we see, and how aging affects the lens causing it to become less flexible. This rigidity is called Presbyopia, which is normally corrected with reading glasses. Learn more about combatting age-related vision loss by watching this animation.

To view an animation that shows what happens during lasik surgery, click here. To learn what causes cataracts, and how they are normally treated, click here.

Sponsored by Abbott Medical Optics - for more information click here. Animation produced by Visible Productions Inc.

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.