The authors investigated changes of the visual field and colour vision in patients with open-angle glaucoma. These visual functions were examined also in a control group of healthy subjects of similar age. For examination of the visual field the authors use the statistical programme of the Tübingen perimeter, and colour vision was assessed using Lanthony s Panel D-15. The statistical parameters of the visual field (MS, MD, LV) in the group of eyes with open-angle glaucoma and in the control group did not differ significantly. A significant difference between groups was found only in the oldest age group. The acquired defects of colour vision were in the group with open-angle glaucoma significantly higher than in the control group and the highest number of acquired defects was found again in the oldest age group. In particular defects in the blue-yellow area were obser- ved.Statistical analysis of the relation between changes of the visual field and defects of the colour vision did not reveal a significant correlation of these visual functions in the group of eyes with open-angle glaucoma. Important factors in the evaluation of the visual field and colour vision of patients with open-angle glaucoma are the age of the investigated subjects, repeated tests of visual functions and long-term follow up.

        Key words: open-angle glaucoma, visual field, colour vision, age