The Perils of Cosmetic Contact Lenses

The vast majority of the world's population are brown-eyed, and for some blue or green eyes are an unattainable ideal. Yet cosmetic contact lenses bring that ideal closer to people, resulting in blue-eyed Chinese men and women. But what are some of the hidden perils of such contact lenses, now even widely available in pasar malams?

Dr. Kenneth Fong shares his perspective on the matter.