Sign up to SpectrumCase studies, CET and eventsSign upExisting user?Already registered?Log in Spectrum is open to all optical industry practitioners, whether or not you work with Specsavers. Membership of the Spectrum club offers:Exclusive news and insight into developments in opticsProfessional development modules, including free online interactive CET (a selection from the wide range on offer to people who work for Specsavers)Unique access to certain Specsavers CET eventsNews and CET email, no more than twice a monthShare, Print or Favourite