S: 1. Invest Ophthalmol Vis Sci. 2002 Oct;43(10):3209-15. Economic evaluation of orthoptic screening: results of a field study in 121 German kindergartens. Konig HH, Barry JC, Leidl R, Zrenner E. Department of Health Economics, University of Ulm, Ulm, Germany. [email protected] PURPOSE: The purpose of this study was to analyze the cost-effectiveness of an orthoptic screeni...