Correction to: Eye (2014); 28: 1364–1369; doi:10.1038/eye.2014.196; published online 29 August 2014
Since the online publication of this article, the authors have noticed that the email address given for the second corresponding author, L Wu, was not changed as requested. The correct email address is firstname.lastname@example.org.
The typesetters would like to apologise for this error.
The online version of the original article can be found at 10.1038/eye.2014.196