Dyslexia and Eye Movements

The mean saccadic reaction time (SRT) of a group of dyslexic children was compared to the SRT of a group of normal children and to another group of normal adults. The mean SRT of the dyslexic group was significantly longer than that of the other two groups. The saccades of the dyslexic group had a shorter SRT when they were directed towards the right than when they were directed towards the left. For the other two groups the converse was true. There were no qualitative or quantitative differences between the optokinetically-evoked nystagmus of dyslexic children and that of normal adults.