Schizophrenia (SCZ) and obsessive-compulsive disorder (OCD) share many clinical features, eg perseverative obsessional or delusional thoughts associated with frontal lobe impairment. Additionally, these disorders may overlap in deficient eye movement behaviour. Comparable deficits in oculomotor planning and control have been revealed in SCZ and OCD, eg poor voluntary inhibition of reflexive saccadic eye movements, which may reflect a common perseverative visuo-cognitive processing style in these illnesses. However, no thorough assessment of OCD and SCZ performance across a range of oculomotor and cognitive tasks has previously been undertaken. We present data from OCD, SCZ and healthy control individuals tested on a battery of oculomotor tasks (visual scanning, tracking, fixation, saccades) and neuropsychological instruments. Spatial and spectral analyses demonstrated clear differences in performance between observer groups. These findings are discussed in terms of perseverative visual attention and cognition processing biases in OCD versus SCZ.