Ultraviolet (UV) light has been proposed as an alternate method for contact lens disinfection. In order for UV light to be considered a viable disinfection method, its effects on contact lens polymers and parameters must be minimal. Soft contact lenses from each of the four FDA categories were exposed to prolonged UV light in a controlled laboratory setting and their parameters measured. We found the diameter and water content of the Group 2 B&L 70 contact lenses to increase significantly with UV exposure. These changes may have an impact on lens fitting characteristics and performance. In addition, handling tinted Cibasoft lenses showed a significant increase in visible light transmission at specific wavelengths. This suggested fading of the tint, which should have little impact on lens wear. Other than these changes, UV light may prove to be a feasible alternative to chemical and thermal methods of contact lens disinfection.