Correction to: Eye (2010) 24, 1320–1324; doi:10.1038/eye.2010.22; published online 9 April 2010

Since the publication of this paper, the authors have noted that Y-R Chung was incorrectly listed as the sole first author. Instead, Y-R Chung and K Lee are the co-first authors as listed above. The typesetters would like to apologise for this error.