van Dijk, Elon H. C.
Soonawala, Darius
Rooth, Vera
Hoyng, Carel B.
Meijer, Onno C.
de Vries, Aiko P. J.
Boon, Camiel J. F.
Funding for this research was provided by:
UitZicht
Rotterdamse Stichting Blindenbelangen
Stichting Blindenhulp
ZonMw VENI Grant
Gisela Thier Fellowship of Leiden University
Article History
Received: 31 July 2017
Revised: 20 September 2017
Accepted: 5 October 2017
First Online: 23 October 2017
Compliance with ethical standards
: All procedures performed were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.
: All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge, or beliefs) in the subject matter or materials discussed in this manuscript.