“Remarkable case report, but its movie-trailer mechanism gets ahead of the evidence.”
“A formerly blind woman with dissociative identity disorder could see and read after switching into a teenage-boy identity because trauma had psychologically blocked vision.”
The post is based on a real published case report by Hans Strasburger and Bruno Waldvogel. It reported more than 10 identity states and a gradual return of vision during psychotherapy; initially, only some states could see. The report found visual evoked potentials absent in blind states and normal in seeing states.
It presents the original cortical-blindness diagnosis as confirmed destruction of the visual-processing center, although the later paper calls that diagnosis misdiagnosed. It also turns recognition of a few magazine-cover words into immediately reading a magazine aloud. Most importantly, the literal trauma-firewall explanation is not established: the authors proposed a possible mechanism, and noted that VEPs alone cannot distinguish psychogenic from organic visual-pathway disruption.
The omitted context changes the core framing from a documented but unusual single-patient observation with a proposed mechanism into proof that a personality bypassed permanently destroyed vision circuitry. That is a materially stronger conclusion than the evidence supports.
Why Clear says this
The central event substantially holds up as a reported clinical case, so it is not false. But the post overstates both the initial brain-damage diagnosis and the certainty of a trauma-based mechanism. Current clinical literature treats functional visual loss as a real disorder of nervous-system function, while cautioning against assuming a purely psychological cause or relying on limited testing alone.
Evidence
- The peer-reviewed report was a single case report, published in 2015, not evidence that the same effect is common or generalizable.
- Its abstract says the patient regained sight step by step during psychotherapy, initially in only a few personality states; switches could occur within seconds.
- The report describes recognition of a few individual words on a magazine title page, initially without recognizing component letters, rather than immediate fluent magazine reading.
- The authors characterized the prior cortical-blindness diagnosis as misdiagnosed and proposed, rather than proved, top-down modulation of the visual pathway.
- Modern reviews describe functional visual loss as a functional neurological presentation and advise diagnosis using positive clinical findings and consideration of neurological and psychological factors, rather than a simple trauma-only explanation.