With 98% accuracy three simple tests can detect schizophrenia.

Schizophrenia diagnosed by simple eye test

Those with schizophrenia showed well-documented deficits in ability to track slow-moving objects smoothly with their eyes. Schizophrenics also found it more difficult to maintain a steady gaze.

“In smooth pursuit, people with schizophrenia have well-documented deficits in the 
ability to track slow-moving objects smoothly with their eyes. Their eye movements tend to fall behind the moving object and then catch up with the moving object using rapid eye 
movements.

“In the free-viewing test, whereas most individuals follow a typical pattern with their gaze as they scan the picture, those with schizophrenia follow an abnormal pattern and, in 
the fixation task, individuals with schizophrenia found it more difficult to maintain a steady gaze.”