RESUMO
PURPOSE: To report a case of falsely dampened visual evoked responses in a patient of Usher syndrome after retinal detachment surgery secondary to probable intraocular silicone oil. METHODS: Retrospective observational case report. CASE DESCRIPTION: A 16-year-old boy with Usher syndrome developed rhegmatogenous retinal detachment in the left eye. He underwent a successful retinal detachment surgery with silicone oil tamponade. On his postoperative follow-up visit, poor vision was noted by our optometrist. A flash stimulus visual evoked response was done, which showed marked delayed latency and reduced amplitude. Marked improvement in the flash stimulus visual evoked response potentials and waveforms was noted after silicone oil removal. CONCLUSION: Intraocular silicone oil could be responsible for this false delay in the latency and reduction in flash stimulus visual evoked response amplitudes. Assessment of flash stimulus visual evoked responses in the presence of silicone oil after vitreoretinal surgery may produce unreliable responses.
Assuntos
Potenciais Evocados Visuais/fisiologia , Retina/fisiopatologia , Descolamento Retiniano/fisiopatologia , Acuidade Visual/fisiologia , Corpo Vítreo/diagnóstico por imagem , Adolescente , Humanos , Masculino , Estimulação Luminosa , Retina/patologia , Descolamento Retiniano/diagnóstico , Descolamento Retiniano/cirurgia , Ultrassonografia , VitrectomiaRESUMO
We describe a case of a 65-year old man diagnosed with retinal vasoproliferative tumour secondary to posterior uveitis. The fluorescein angiography shows an interesting meteor-like leak emanating from the tumour and rising towards the superior retina in the later frames of the angiogram. Pictorially, we call it the "Retinal Meteor" and also describe the possible mechanism for this pattern of leakage.
