Gear eye movements in people

Eye movements and schizophrenia

Scientists in the UK have found that simple eye tests can detect disturbed eye movements, which can differentiate schizophrenia cases from healthy controls with over 98% accuracy. Their model was presented in the journal Biological Psychiatry. Earlier studies linked disturbed eye movements with schizophrenia. The lead authors Dr. Philip Benson and David St Claen of the University of Aberdeen in the UK comment: "It has been known for over a hundred years that people with psychotic disorders have various eye movement abnormalities, but until our novel test study, no one believed they did Deviations were sensitive enough to be used as potential biomarkers for clinical diagnosis. Tests included gaze tracking, free viewing and gaze fixation. With regard to gaze tracking, patients with schizophrenia lacked the ability to easily track slowly moving objects with their eyes . Their eye movements usually lag behind the moving object and they try to catch up with the object with rapid eye movements. Experts call this rapid eye movement saccade. When viewed freely, the test focuses on a displayed image. Here most people follow with their Bl ick a typical pattern when scanning the image, but this pattern differs in people with schizophrenia. In the gaze fixation test, the subjects had to stare rigidly at a single, stationary target. The control group succeeded in this task, whereas the subjects with schizophrenia had difficulties with it. In this study, the researchers observed that the performance of subjects with schizophrenia differed from the performance of healthy subjects. The team then modeled the data and checked the accuracy of each individual algorithm using various eye tests. The test data showed an accuracy of 98.3%. "The high sensitivity of this model for diagnosing schizophrenia is encouraging," commented Dr. John Krystal, editor of Biological Psychiatry. "To what extent this approach will allow clinical researchers to differentiate people with schizophrenia from people with other psychiatric disorders is an interesting point." Dr. Benson and St Clair are already working on this question: "We now have exciting unpublished data showing that the patterns of eye movement abnormalities are specific to different psychiatric subsets, another important requirement for diagnostic biomarkers. What we want to know next is when the anomalies are first detectable and whether they can be used as disease markers for early intervention studies in major mental illnesses. We also want to explore how best to develop our findings for use in clinical practice. "More information is available available at: University of Aberdeen: http://www.abdn.ac.uk/ Biological Psychiatry: http://www.journals.elsevier.com/biological-psychiatry/