The Exploration Of Identification Value Of Distance Of Binoculus Point Of Regard Of Children With Autism Spectrum Disorder In Smooth Pursuit Eye Movement Task

Perception disorders,especially visual disorders of individuals with autism spectrum disorder(ASD)have a significant diagnostic value.Studies have shown that individuals with ASD had abnormal binocular vision,showing function of binocular fusion is defective,which may cause difficulties in further processing of visual information.To explore the identification value of individuals with ASD in the processing of dynamic stimulation,two studies were designed.In Study 1,25 ASD children at 3 to 6 years old and age-matched 25 typically developing children were selected,and let them watch 6 smooth tracking task videos of sinusoidal motion of the small ball,as well as original coordinate of binoculus of subjects and position error of small ball was recorded,to explore the difference,influencing factors,as well as identification value of distance of the binoculus point of regard(DBPR).The results showed:(1)binocular fusion function of ASD children is impairment and independent of strabismus;(2)the DBPR of ASD children is oversized,which has the stability of cross-task type;(3)the DBPR has good identification ability,especially under the condition of large amplitude as well as fast speed;(4)the DBPR is significantly positively correlated with gross score of the autism behavior checklist(ABC)and sensation dimension,showing that the DBPR can be used as one of identification indexes to measure the abnormal perception in ASD children.In Study 2,on the basis of previous studies,masking stimuli was added to block part of the trajectory of ball motion,in order to explore the performance of the predictive tracking in ASD children as well as its effect on the DBPR.20 ASD children at 3 to 6 years old and age-matched 20 typically developing children were selected,let them watch 6 video materials.The results showed:(1)the DBPR is affected by the speed and the vanishing time of stimulation;(2)the DBPR has relatively high identification value under the condition of fast speed and long predictive tracking.In conclusion,compared with typically developing children,the DBPR of ASD children reflects the defection of the binocular fusion,and has stability of cross-task type.It has good identification value under the condition of the fastest speed,largest amplitude as well as long predictive tracking.