A uniform illumination of top illumination test charts was achieved allowing adherence to the standards for measuring acuity set out by the European Union and enabling comparison of such visual examinations in multi-centre clinical studies.
The British journal of ophthalmology
STZ eyetrial at the Centre for Ophthalmology, Schleichstraße 12-16, 72076 Tübingen, Germany. wilhelm.durst [at] stz-eyetrial.de
Br J Ophthalmol. 2011 Nov;95(11):1506-8
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