'Revision in Optics and Refraction' for the first time provides candidates for the Optics and Refraction Module of the MRCOphth examinations with an opportunity to practice answering MCQs and review their practical skills. The concise introduction sets out the requirements of the examination, followed by a guide to the practical skills required, with useful checklists of equipment and essential clinical questions. Four papers, each with 60 5-stem MCQs, then test knowledge in a format compatible with the actual examination. All answers are supported by detailed explanations.