| Social communication and social interaction disorders are one of the core symptoms of autism spectrum disorder, and visual attention is one of the most important aspects of social interaction. The non-verbal communication ability of children with autism may be different from that of normal children in infancy. Some early signs include lack of visual attention, ignoring responses to louder volumes, and lack of response to facial expressions. Among them, insufficient visual attention is one of the indicators for diagnosing autism, which is very obvious before the age of 2 years and can predict autism symptoms. Eye-tracking technology has become an important tool for studying the visual attention of children with autism. In addition, eye-tracking technology has the advantages of non-invasiveness, objective and quantifiable data, and wide applicability in terms of age. At present, relevant research in China mainly focuses on the early screening of autism by using emotional cue attentional bias, eye attentional bias, face scanning paradigm, social scene paradigm, and the combined attentional paradigm of static and dynamic naturalistic scenes. However, foreign researchers not only focus on the visual patterns of children with autism in processing social cues, at the same time, brain imaging technology is also combined to study the potential neural mechanisms that cause abnormal visual behavior patterns. This paper discusses the current screening situation of autism in China, the eye movement characteristics of autism, the advantages of eye-tracking technology and the application of eye-tracking technology in the early screening of autism. |
