A Master UDI-DI becomes obligatory for spectacle frames and lenses

Commission Delegated Regulation (EU) 2025/1920, which was published on 23 September 2025, has introduced an obligation to assign a Master UDI-DI to spectacle frames, spectacle lenses and ready-to-wear reading spectacles. A Master UDI-DI must be assigned to frames sharing the same design parameters, to lenses with the same combination of design parameters, and to ready-to-wear reading spectacles that products sharing same combination of design parameters. Changes to these parameters will require a new Master UNI-DI. The obligations was introduced through an addition to Annex VI Part C to the MDR.

The new obligations imposed by the Regulation will apply from 1 November 2028.

However, in MDCG 2025-7 concerning Timelines of the implementation of ‘Master UDI-DI’ to contact lenses and spectacle frames, spectacle lenses and ready-to-wear reading spectacles, the MDCG urges manufacturers to assign Master UDI-Ds as soon as possible.

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