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Abstract Purpose: The aim of the present study was to test the influence of smoking on colour perception. Subjects and methods: At the University Eye Hospital Tbingen, 76 generally healthy smokers with inconspicuous ophthalmological findings (visual acuity, refraction, intraocular pressure, morphology) were examined by the cap-sorting test, Roth 28-hue desaturated. Group 1 was comprised of smokers...