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Explanation: Reuters, Medical dictionary, English>German (Thieme) lists the following: (nicht entzündliche) Netzhauterkrankung, Retinopathie, Retinopathia, Retinose. That should give you some choices... Check out also http://www.roche-lexikon.de or see if you can find Pschyrembel (klinisches Wörterbuch) on the Web. And again, I refer you to Alcon's German website.