Objective：To explore the digital distance effect of children with school age amblyopia. Methods：A total of 98 children with school age amblyopia in our hospital from January 2015 to January 2017 were enrolled. Among them，31 patients were divided into the 7-year-old group（6 to 8 years old） and 29 patients were divided into the 9-year-old group（9 to 10 years old） and 38 patients were divided into the 12-year-old group（11 to 13 years old）. Another 98 healthy children without school age amblyopia were select－ed as the control group and divided into the 7-year-old group（n=29），the 9-year-old group（n=32） and the 12-year-old group（n=37）. Reaction time and reaction time difference of different numbers in different groups were compared. Results：When number ≥5，the reaction time in the observed 7-year-old group was significantly longer than that in the control 7-year-old group（P<0.05）. The difference of reaction time for 1，2，3 and 4 was without statistical significance（P>0.05）. The reaction time for 1，2，8 and 9 of the 9-year-old group was significantly longer than that in the control group，with statistically significant difference（P<0.05）. The reaction time for 3，4，5，6 and 7 in two groups was not statistically significant（P>0.05）. The reaction time for 1 to 9 in the observed 12-year-old group was longer than that in the control 12-year-old group（P<0.05）. Compared with the same age，the reaction time in the ob－servation group was significantly lower than in the control group（P<0.05）. Among the observed 98 patients，the reaction time for chil－dren with mild amblyopia was shorter than that of children with moderate and severe amblyopia，while the reaction time for children with moderate ambluopia was shorter than that of children with severe amblyopia，with a statistically significant difference（P<0.05）. Conclusion：The reaction time of children with school age amblyopia is longer than that of the normal children（especially≥5） and the digital processing ability of unhealthy children is was slower.