AIM: To evaluate the long-term impact of mild traumatic brain injury(mTBI)on oculomotor parameters.

METHODS: Prospective study. A total of 46 patients from 6 to 12mo after mTBI who visited Tianjin Eye Hospital from February to August 2021 were collected. According to the score of the Brain Injury Vision Sympton Survey(BIVSS)Questionnaire, they were divided into the symptomatic group of mTBI(BIVSS total score ≥32, n=24)and the asymptomatic group of mTBI(BIVSS total score <32, n=22). In addition, healthy people without mTBI were selected as the control group(n=23). All of the subjects accepted test of oculomotor parameters to evaluate binocular vision.

RESULTS: Monocular accommodation amplitude, monocular accommodation facility, the absolute value of phoria at near, BI recovery point of fusional range at near and saccades were different among the three groups(P<0.05); There were no significant differences in near point of convergence, the absolute value of distance phoria, BI blur, BO blur and recovery of fusional range at near among the three groups(P>0.05). The incidence of accommodative abnormality, convergence abnormality, and saccadic dysfunction were different among the three groups(P<0.01). The incidence of accommodative abnormality in the symptomatic group was significantly higher than that in the asymptomatic and control groups(all P<0.0167); the incidence of convergence dysfunction in the symptomatic and the asymptomatic groups were higher than that in the control group(all P<0.0167); the incidence of saccadic dysfunction in the symptomatic group was significantly higher than that in the asymptomatic and control groups(all P<0.0167).

CONCLUSION: Accommodation, convergence, and saccades functions in the mTBI symptomatic group were lower, and some of the binocular vision in the asymptomatic group was also affected. It is suggested that mTBI has a long-term impact on oculomotor parameters, and comprehensive oculomotor assessment is necessary for mTBI patients.