El Nistagmo Optocinético
El nistagmo optocinético (OKN) es un reflejo ocular que consiste en movimientos oculares involuntarios en respuesta a la movilidad del entorno visual. Este fenómeno incluye una fase lenta de movimiento ocular en la dirección del estímulo seguida por una fase rápida en la dirección opuesta. Cuando se realiza en el consultorio, las fases lentas representan el seguimiento suave y las fases rápidas representan los saccades.
Aplicaciones y Valor Clínico
El OKN es especialmente útil para evaluar el sistema visual en pacientes no colaboradores. Su valor diagnóstico y localizador radica en la capacidad de identificar anomalías tanto en la fase lenta como rápida, lo que puede proporcionar información sobre problemas neurológicos o oculars.
Practicalactical Recommendations
- Para realizar el OKN, se puede utilizar una aplicación como SmartOptometry, que permite obtener un tambor optocinético.
- Es importante evaluar tanto las fases lentas (representando el seguimiento suave) como las rápidas (representando los saccades) para una evaluación completa del sistema visual.
Diagnostic Criteria
El OKN es normalmente conjugado y simétrico tanto horizontal como verticalmente. Abnormalidades en la respuesta optocinética pueden proporcionar información diagnóstica y localizadora. Se describen seis escenarios clínicos donde el OKN es especialmente útil para los neurologistas en práctica.
Referencias
19955111
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1.
Hale DE, Reich S, Gold D. Optokinetic nystagmus: six practical uses. Practical Neurology [Internet]. 2024 Mar 20 [cited 2024 May 29];24(4):285–8. Available from: https://pn.bmj.com/content/early/2024/03/20/pn-2023-003772