CK-12 Foundation
Ck 12 Exploration Series: Simulations: Physics: Contact Lens
[Free Registration/Login Required] A simulation exploring how contact lens correct your vision!.
National Academy of Engineering
Health Technologies Timeline
Find a timeline of important medical inventions of the 20th century. Inventions include the first electrocardiograph, the first kidney dialysis machine, the first plastic contact lens, and the first artificial heart.