Over the last decades, the analysis of eye movements has proven very useful to investigate the cognitive processes underlying reading. However, from a developmental perspective, this technique has yet hardly been used to better understand the children’s acquisition of reading. This chapter aims at presenting a review of the studies comparing the eye-movement patterns observed in children with those observed in adult readers. Firstly, it presents the differences and similarities in eye-movement patterns between those two groups, and then it proposes different attempts at explaining these differences in terms of oculomotor, visual and linguistic constraints.