The 4th edition of the WHO Classification of Tumours of the Eye has been published. It was edited by Hans E. Grossniklaus, Charles Eberhart, and Tero Kivelä, with 64 authors from 22 countries. The volume includes more than 400 colour images and tables, as well as more than 1400 references. It has sections on all recognized neoplasms (and their variants) of the eye, lacrimal apparatus, and conjunctiva. Substantial changes were made to the classification of conjunctival neoplasia and melanoma, based on the latest information from genetic and molecular studies. It is available from http://publications.iarc.fr/561