Prevalence of esophoria in concussed patients / Prevalencia de la endoforia en los pacientes con conmoción

Purpose: To assess the prevalence of esophoria at near in concussed patients in a neuro-optometric private practice setting. Methods: A retrospective analysis was performed involving a chart review in a neuro-optometric, private practice setting of consecutive patients with a medical diagnosis of concussion from January 1st 2016 to December 31st 2016. A total of 71 patients were included in the analysis. All received a comprehensive vision examination, with a near vision emphasis. The near horizontal phoria was assessed with the cover test and the von Graefe test. Results: Approximately 30% of the patients with a medically based diagnosis of concussion exhibited esophoria at near, with good agreement (95%) between the two tests. Mean esophoria was 5.2 (SD=2.8) prism diopters (pd), with a range from 2pd to 14pd of esophoria. Convergence excess was diagnosed in 23%. Discussion: Near esophoria was found in nearly one-third of this practice-based sample of concussed patients. Thus, it was more common than typically believed to be the case. Two proposed oculomotor-based mechanisms related to these symptomatic esophoric patients included phoria decompensation and excessive accommodative vergence

Objetivo: Evaluar la prevalencia de la endoforia de cerca en pacientes con conmoción, en un centro privado de neuro-optometría. Métodos: Se realizó un análisis retrospectivo, en un centro privado de neuro-optometría, con revisión de las historias de pacientes consecutivos con diagnóstico médico de conmoción desde el 1 de enero al 31 de diciembre de 2016. Se incluyó en el análisis a un total de 71 pacientes. A todos ellos se les realizó un examen ocular amplio, enfatizando la visión de cerca. La foria horizontal de cerca se valoró mediante el cover test y la prueba de von Graefe. Resultados: Aproximadamente el 30% de los pacientes con diagnóstico médico de conmoción mostraron endoforia de cerca, con buena concordancia (95%) entre las dos pruebas. La endoforia media fue de 5,2 (SD = 2,8) dioptrías prismáticas (pd),con un rango de 2 pd a 14 pd de endoforia. El exceso de convergencia se diagnóstico en el 23%. Discusión: Se encontró endoforia de cerca en cerca del 25% de la muestra de pacientes con conmoción. Por tanto, esta condición clínica resultó ser más común de lo que se creía. Dos mecanismos propuestos basados en el sistema oculomotor con relación a estos pacientes endofóricos sintomáticos incluyeron descompensación de foria y exceso de vergencia acomodativa

Prevalence of esophoria in concussed patients.

PURPOSE: To assess the prevalence of esophoria at near in concussed patients in a neuro-optometric private practice setting. METHODS: A retrospective analysis was performed involving a chart review in a neuro-optometric, private practice setting of consecutive patients with a medical diagnosis of concussion from January 1st 2016 to December 31st 2016. A total of 71 patients were included in the analysis. All received a comprehensive vision examination, with a near vision emphasis. The near horizontal phoria was assessed with the cover test and the von Graefe test. RESULTS: Approximately 30% of the patients with a medically based diagnosis of concussion exhibited esophoria at near, with good agreement (95%) between the two tests. Mean esophoria was 5.2 (SD=2.8) prism diopters (pd), with a range from 2pd to 14pd of esophoria. Convergence excess was diagnosed in 23%. DISCUSSION: Near esophoria was found in nearly one-third of this practice-based sample of concussed patients. Thus, it was more common than typically believed to be the case. Two proposed oculomotor-based mechanisms related to these symptomatic esophoric patients included phoria decompensation and excessive accommodative vergence.