the conclusion that there are no c/e blind people with schizophrenia is based on a small number of studies that involved relatively small samples. in short, available evidence, probabilistic estimates, and the striking contrasts, within the same domains of cognition, between superior functioning in c/e blindness and impaired functioning in schizophrenia, combine to suggest a protective relationship. that said, given the potentially important lessons for understanding, preventing, and treating schizophrenia that brain reorganization in c/e blindness provides, we believe it is useful to pursue this line of thought. finally, we hope to raise awareness in the psychiatric community of past literature relating to c/e blindness and schizophrenia, so that if people with both conditions exist, their cases will be reported.
natura fascit saltus: discontinuities in the latent liability to schizophrenia and their implications for clinical psychiatry. antecedent probability and the efficiency of psychometric signs, patterns, or cutting scores. ricciardi, e., and pietrini, p. (2011). the prevalence of usher syndrome and other retinal dystrophy-hearing impairment associations. this is an open-access article distributed under the terms of the creative commons attribution license, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.
as the authors note, “across all past papers, there has not been even one reported case of a congenitally blind person who developed schizophrenia.” however, this is not so with blindness developed later in life. but the authors also point out that autism is very common in blind children by contrast to both congenital deafness and deaf-blindness, which are associated with increased risk of psychosis. although mentalistic deficits combined with mechanistic and sensory compensations seem to be a primary developmental factor in autism, they are probably a secondary consequence of the loss of sight in blind individuals.
and although there is obviously no direct parallel with congenital blindness here, the authors of the frontiers of psychology study point out that the congenitally blind are protected from the abnormal visual inputs which have been implicated in schizophrenia. put very crudely, the diametric model suggests that the best way to cure psychotics is to make them somewhat autistic, and pitch-discrimination training in particular and fostering cognitive reserve, in general, are examples of how this can be done, as i pointed out in an earlier post. indeed, anything that can push the balance in the autistic direction will suffice to counter psychotic tendencies, and early-onset blindness certainly appears to do so where providing protection from schizophrenia is concerned—just as the diametric model predicts.
people with schizophrenia have been shown to have problems with their vision, including retina issues, unusual eye movements, and abnormal blindness that is the result of childhood-onset retinitis pigmentosa and schizophrenia-like psychosis can co-exist in bardet-biedl syndrome (weiss et al., 1981) congenital/early blindness is reportedly protective against schizophrenia. using a whole-population cohort of 467945 children born in western australia, .
the words above suggest that blindness may be protective of schizophrenia, and represent the first formulation of this hypothesis, these findings suggest that something about congenital blindness may protect a person from schizophrenia. this is especially surprising, the conclusion that there are no c/e blind people with schizophrenia is based on a small number of studies that involved relatively small, .
When you try to get related information on blindness and schizophrenia, you may look for related areas. cortical blindness and schizophrenia,congenital blindness schizophrenia,vice blind schizophrenia,cortical blindness schizophrenia .