Prevalence of refractive errors in the European adult population: the Gutenberg Health Study (GHS)
Christian Wolfram, René Höhn, Ulrike Kottler, Philipp Wild, Maria Blettner, Jens Bühren, Norbert Pfeiffer, Alireza Mirshahi
British Journal of Ophthalmology Jul 2014, 98 (7) 857-861; DOI: 10.1136/bjophthalmol-2013-304228