This episode presents a research paper that discusses ocular dominance - the idea of a dominant eye that controls visual perception. In the episode, Dr. Laby argues that ocular dominance is a myth and that the various tests used to assess it are flawed. An article by Dr. Laby and Dr. Kirschen explores the history and science of ocular dominance and the problems associated with its testing. The research paper "Effect of Ocular Dominance on the Performance of Professional Baseball Players" analyzes the impact of ocular dominance on the performance of professional baseball players and concludes that ocular dominance does not affect performance in baseball. All three sources argue that ocular dominance is not a relevant factor in most sports, but might be significant in sports like archery where one eye is used exclusively for aiming.