1. Ophthalmology; St Thomas' Hospital; London SE1 7EH UK
2. Institute of Optometry; Neville Chappell Research Clinic; London SE1 6DS UK
3. London South Bank University; Faculty of Health and Social Care; London SE1 0AA UK
4. School of Optometry and Vision Sciences; Cardiff University; Cardiff CF24 4HQ UK
5. Cole Martin Tregaskis Optometrists; Brentwood Essex CM15 8AG UK