1. From the Department of Ophthalmology, VU University Medical Centre, Amsterdam, The Netherlands; the2Institute for Research in Extramural Medicine, VU University Medical Centre, Amsterdam, The Netherlands; the
2. Department of Research and Development, Visio Het Loo Erf, National Rehabilitation Centre for visually impaired adults, Apeldoorn, The Netherlands; and the
3. From the Department of Ophthalmology, VU University Medical Centre, Amsterdam, The Netherlands; the2Institute for Research in Extramural Medicine, VU University Medical Centre, Amsterdam, The Netherlands; the4Department of Ophthalmology, Elkerliek Hospita