A visuomotor task was used in 3 cases of isolated optic ataxia, in patients with a unilateral parietal lesion (1 right and 2 left). Eye and hand movements were recorded in pointing at visual targets in a closed loop condition. Saccades directed to the contralateral side were abnormal in 2 patients. Hand pointing was always accurate in foveal vision condition. Errors observed in peripheral vision condition differed according to the side of the lesion. The contribution of oculomotor signals in optic ataxia and the influence of hemispheric specialization are discussed.