PD IS0/TR 20772:2018 BSl Standards Publication Ophthalmic optics Spectacle lenses Short wavelength visible solar radiation and the eye bsi. PDIS0/TR20772:2018 PUBLISHEDDOCUMENT Nationalforeword This Published Document is the UK implementation of IS0/TR20772:2018. The UK participation in its preparation was entrusted to Technical CommitteeCH/172/3,Spectacles. Alist of organizations represented onthis committeecanbe obtained on request to its secretary. This publication does not purport to include all the necessary provisions ofacontract.Users areresponsibleforits correctapplication. The British Standards Institution 2018 Published byBSI Standards Limited 2018 ISBN9780580962974 ICS 11.040.70 Compliance with a British Standard cannot confer immunityfrom legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 30 September 2018. Amendments/corrigendaissued sincepublication Date Text affected PD IS0/TR 20772:2018 TECHNICAL ISO/TR REPORT 20772 First edition 2018-10-03 Ophthalmic optics Spectacle lenses Short wavelength visible solar radiation and the eye Optiqueophtalmique-Verredelunettes-L'ceil et lesradiations solairesvisiblesdecourteslongueursd'onde Reference number IS0/TR 20772:2018(E) ISO @ IS0 2018