Sir,

We thank Mr Jones1 for his interest in our paper reporting on the leading causes of certifiable vision impairment in England and Wales in the year ending 31 March 2013.2 The cause of certifiable loss is determined by the examining consultant ophthalmologist and there is a field on the form for recording any diagnosis not presented in the picking list. It is a challenge to present this rich data source within a single report, and since this is an analysis on all ages clearly conditions that affect younger groups are likely not to feature. In answer to the question raised, we can report that there were 24 certifications with a main cause of visual loss being uveitis. We would point out, however, that this is the number of certifications rather than the numbers visually impaired—for an accurate estimate of incidence, clearly an epidemiological research study would be advised. The CVI data might, however, well serve as a useful guide for development of such valuable research.