Schizophrenia is a grouping of symptoms that are generalized to an inability for a person to smoothly track reality. For example, when a person without schizop

Schizophrenia is a grouping of symptoms that are generalized to an inability for a person to smoothly track reality. For example, when a person without schizophrenia attempts to track the trajectory of an object, the eyeballs follow a smooth path. When a person with schizophrenia attempts the same, the eyeballs do not follow a smooth path, with the focal point moving chaotically off center from the target. A part of the diagnostic criteria for schizophrenia is testing whether or not the eye can smoothly track the movement of an object. This would likely be why it is difficult to diagnose someone that was born blind. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3212396/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3212396/