Luzia Müller1,2, Graham Mb Reeves3, James Cy Leong4, Anthony P Wells1,5. 1. Capital Eye Specialists, Wellington, New Zealand. 2. Cantonal Hospital of Lucerne, Switzerland. 3. Manukau SuperClinic, South Auckland, New Zealand. 4. Canterbury Eye Service, Christchurch Hospital, New Zealand. 5. Ophthalmology Department, Wellington Hospital, New Zealand.