This animation by Visible productions explains the process by which we see and how imperfections in the cornea result in nearsightedness, farsightedness and astigmatism. It also shows how lasik surgery is performed to correct these conditions.

To view an animation that explains how aging affects our vision, 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.