Footnotes

• Linked articles 182758.

• A summary of the ideas outlined in this Editorial was recently presented at the 19th Meeting of the Imaging and Perimetry Society (IPS; March 2010).

• Competing interests The authors have commercial interest in the Spark strategy and in the TNT program.

• Ethics approval The paper is an editorial, and discusses general considerations, but all our work respects the Declaration of Helsinki. This study was conducted with the approval of the Hospital Universitario de Canarias.

• Provenance and peer review Commissioned; externally peer reviewed.