Erratum {#Sec1}
=======

In the publication \[[@CR1]\] there were errors in the acknowledgments. An investigator's name was not spelt correctly and the Department of Health disclaimer was not included.

The investigator name was spelt as:

Haogang Zhou

The correct version is:

Haogang Zhu

The correct acknowledgements are:

We would like to acknowledge the following: the LiGHT Trial Study Group (Gareth Ambler, Keith Barton, Rupert Bourne, David Broadway, Catey Bunce, Marta Buszewicz, Amanda Davis, Anurag Garg, David Garway-Heath, Gus Gazzard, Rachael Hunter, Yuzhen Jiang, Evgenia Konstantakopoulou, Sheng Lim, Joanna Liput, Timothy Manners, Stephen Morris, Neil Nathwani, Gary Rubin, Nicholas Strouthidis, Victoria Vickerstaff, Sarah Wilson, Richard Wormald, Haogang Zhu); Moorfields Eye Hospital NHS Foundation Trust for acting as sponsors for the study; Moorfields Biomedical Research Centre for providing R&D support; and the PRIMENT Clinical Trials Unit for providing support in the design and conduct of the trial.

This project was funded by the NIHR \[HTA\] (09/104/40-LiGHT). The views expressed are those of the authors and not necessarily those of the NHS, the NIHR or the Department of Health.

The online version of the original article can be found under doi:10.1186/s13063-015-1047-9.
