Can deteriorating vision in one eye be caused by DicloDuo Combi?

Side effects of DicloDuo Combi such as blurred vision, double vision or optic neuritis are rare (may affect up to 1 in 1000 people). It cannot be ruled out that such an action will occur in your case, so I would recommend reporting it to your doctor. Reporting side effects to your doctor or individually allows you to gather more information about the safety of your medications and update data about them, which can help other patients in the future. We wrote about how to report them here: https://www.gdziepolek.pl/artykuly/jak-i-dlaczego-zglaszac-dzialania-niepozadane