Newcastle Eye Centre, Newcastle Upon Tyne NHS Hospitals Foundation Trust, Tyne and Wear, UK. James.talks@nuth.nhs.uk. Newcastle Eye Centre, Newcastle Upon Tyne NHS Hospitals Foundation Trust, Tyne and Wear, UK. Frimley Park Hospitals NHS Foundation Trust, Camberley, GU16 7UJ, UK. University Hospitals Bristol NHS Foundation Trust, Bristol, BS2 8AE, UK. King's College Hospital NHS Foundation Trust, London, SE5 9RS, UK. Hull Royal Infirmary, Hull and East Yorkshire Hospitals NHS Trust, Hull, HU3 2JZ, UK. Oxford Eye Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, OX3 9DU, UK. Moorfields Eye Hospital NHS Foundation Trust, London, EC1, UK.