The European Medical Device Regulations (Regulation 2017/745, MDR) require that each particular device model has its own UDI-DI. Contact lenses vary widely, requiring the manufacturer to specify a number of UDI-DI. The EC adopted this mandate out of concern that a higher number of UDI-DI would lead to a surge in medical device registrations in EUDAMED. The amendment takes effect on November 9, 2..