Research has shown that large visual illusions and an external focus of attention can improve novice’s motor learning. However, the combined effects of these approaches, and the underlying mechanisms have yet to be studied. Therefore, the present study examined the effects of a large visual illusion and an external focus on the learning of a dart throwing task in novices and measured the perceptual mechanisms underpinning learning using quiet eye. 40 novice participants randomly divided into 4 groups; large visual illusion, external focus of attention, combined large visual illusion and external focus of attention and control group. The study consisted of a pre-test, practice phase, immediate retention test, 24-hr retention test and transfer test. Results revealed that all groups increased throwing accuracy and quiet eye duration from pre-test to immediate retention. In the immediate retention, 24-hr retention and transfer test, large visual illusion had greater accuracy and longer quiet eye duration than the control group. Additionally, there were no significant differences between the visual illusion and external focus groups for throwing accuracy and quiet eye duration. The findings suggest that combining large visual illusion and external focus can independently improve motor learning but combining these manipulations does not have additive benefits.