Financial & competing interests disclosure
RR Ali and JWB Bainbridge are supported by the NIHR Biomedical Research Centre for Ophthalmology, Medical Research Council, Moorfields Eye Hospital Special Trustees, RP Fighting Blindness UK, The Newman Foundation and the Rosetrees Trust. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.