Urgent Ophthalmologic Referral and Management of Visual Hallucinations & Photopsias

Immediate Triage – Vision‑Threatening Emergencies

Patients who present with new‑onset flashes (photopsias) should receive a same‑day (within 24 hours) ophthalmologic examination to rule out posterior vitreous detachment (PVD) with retinal tears, because retinal tears occur in 8–22 % of individuals with flashes and can lead to permanent vision loss if untreated【1】【2】.
When a retinal detachment is identified early, ≈ 95 % can be successfully repaired, yielding better visual outcomes when treatment occurs before macular involvement【1】【2】.

Posterior vitreous detachment accounts for 39.7 % of photopsias among vitreoretinal patients; it typically occurs in adults aged 45–65, earlier in myopic or traumatically injured eyes【1】【2】.
Characteristic PVD photopsia features (based on pooled data):
- Temporal location in 86 % of cases【2】
- Occurrence preferentially in dark environments in 90 % of cases【3】
Migraine aura explains 6.5 % of photopsias; patients often misinterpret these as monocular, and the aura typically appears as zig‑zag scintillating scotomas lasting 5–60 minutes【4】.

CBS is the most likely diagnosis for visual hallucinations occurring with eyes closed in any individual with reduced vision【5】【6】【7】.
Diagnostic criteria (all must be met):
Prevalence: CBS occurs in 15–60 % of visually impaired patients, varying by studied population【5】【6】【7】.
Pathophysiology: hallucinations arise from cortical‑release phenomena due to diminished afferent visual input【5】【6】【7】.

Atypical signs (e.g., lack of insight despite education, interactive hallucinations, concurrent neurological deficits) warrant brain MRI and neurological work‑up【5】【6】【7】.
Visual hallucinations are a core diagnostic criterion of Dementia with Lewy Bodies【5】【6】【7】.

Same‑day assessment is essential to detect retinal tears; early repair of detachments leads to high success rates (≈ 95 %)【1】【2】.

Education is the first‑line, therapeutic intervention; explaining that CBS hallucinations are common in visual impairment provides significant relief and reduces anxiety【5】【6】【7】.
Self‑management techniques (eye‑movement exercises, adjusting lighting, distraction) are recommended【5】【6】【7】.
Referral to vision‑rehabilitation services (lighting modification, magnification, contrast enhancement) is advised.
Psychological therapies and support groups have moderate‑quality evidence for improving vision‑related quality of life and reducing depression【6】【7】【3】.

Vision loss markedly raises the risk of mental‑health deterioration; patients with severe mood changes, functional interference, or suicidal ideation should receive formal psychiatric assessment【5】【6】【7】【3】.

Pharmacologic agents are not first‑line for CBS; current evidence shows no significant efficacy of any medication in typical CBS cases【5】【6】【7】.
Antipsychotics should be avoided in patients who retain insight, as hallucinations are benign; limited case‑report data suggest atypical antipsychotics may be considered only after failure of education and non‑pharmacologic measures【5】【6】【7】.

Do not dismiss flashes without ophthalmologic evaluation; retinal tears develop in 8–22 % of acute PVD presentations【1】【2】.
Do not assume monocular origin of visual phenomena; migraine aura is frequently misperceived as monocular【4】.
Medication review is essential because agents such as propranolol, anticholinergics, dopaminergic drugs, and steroids can provoke visual hallucinations (not cited).

All facts are presented in English, with patient‑specific details generalized to preserve privacy.

El síndrome de Charles Bonnet se caracteriza por alucinaciones visuales recurrentes y vívidas en pacientes con déficit visual, donde el paciente mantiene conciencia de que lo que ve no es real, según la Sociedad Americana de Oftalmología 8, 9
La prevalencia del síndrome de Charles Bonnet varía entre 15% y 60% en pacientes con trastornos oftalmológicos, dependiendo de la definición y población estudiada, según la Sociedad Americana de Oftalmología 9
Las alucinaciones en el síndrome de Charles Bonnet son atribuidas a un fenómeno de liberación cortical resultante de la falta de información visual aferente, según la Sociedad Americana de Oftalmología 9
Pueden ocurrir en pacientes con reducción de agudeza visual, sensibilidad al contraste o pérdida del campo visual, incluso en pacientes con pérdida visual monocular, según la Sociedad Americana de Oftalmología 9

Las alucinaciones visuales ocurren en hasta el 80% de los pacientes con enfermedad de Parkinson y forman uno de los criterios diagnósticos centrales para la demencia con cuerpos de Lewy, según Praxis Medical Insights 10

Es fundamental distinguir entre las alucinaciones visuales causadas por el síndrome de Charles Bonnet y aquellas causadas por otras entidades como la enfermedad de Parkinson, demencias, enfermedad psiquiátrica o efectos secundarios de medicamentos, según la Sociedad Americana de Oftalmología 9
Las características atípicas que deben levantar sospecha de un diagnóstico diferente al síndrome de Charles Bonnet incluyen la falta de conciencia sobre la naturaleza irreal de las imágenes, imágenes que interactúan con el paciente, u otros signos o síntomas neurológicos asociados, según la Sociedad Americana de Oftalmología 9
Los pacientes con características atípicas requieren una evaluación médica o neuropsiquiátrica para un diagnóstico preciso, según la Sociedad Americana de Oftalmología 9