Day, A C
,
Donachie, P H J
Sparrow, J M
Johnston, R L
Article History
Received: 27 April 2015
Accepted: 11 July 2015
First Online: 23 October 2015
Competing interests
: PHJD’s employer received unrestricted funding from The Special Trustees of Moorfield’s Eye Hospital to analyse these data. RLJ is the Medical Director of Medisoft Limited, which developed the electronic medical record from which data were extracted, for the first iteration of the National Ophthalmology Database. The remaining authors declare no conflict of interest.