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Volume 13 of Modern Problems in Ophthalmology is a compilation of the papers presented at the second symposium of the International Research Group on Colour Vision Deficiencies held in Edinburgh in 1973. The group was formed in 1969 during the Congress of the International Colour Association in Stockholm. Its members come from varied disciplines (ophthalmology, psychology, physics, and biology) but share a common goal: the understanding of color vision deficiencies. The first meeting held in Ghent was devoted to the topic of acquired color defect and drew 35 papers on the examination, description, mechanisms, and pathology of color vision deficiencies that were compiled in volume 11 of Modern Problems in Ophthalmology. The second symposium held in Edinburgh was opened to discussion of all color vision deficiencies. It elicited the 62 papers contained in volume 13 that are divided into major subheadings titled "Methods of Examination" (21 papers), "Congenital Defects" (25
Pokorny JM. Modern Problems in Ophthalmology, vol 13—Colour Vision Deficiencies II. Arch Ophthalmol. 1976;94(1):167. doi:10.1001/archopht.1976.03910030089021