We have recently published a new paper on the link between visual working memory and saccade execution. Our findings indicate that the visual system can flexibly allocate the resources of visual working memory for either saccade tasks or actively committing items to working memory. We conclude that making an eye-movement compulsorily uses these visual working memory resources, similar to volitionally committing an extra item to memory.
Schut, M.J., Van der Stoep, N., Postma, A., & Van der Stigchel, S. (in press). The cost of making an eye movement: A direct link between visual working memory and saccade execution. Journal of Visions