 Hering and Helmholtz disagree, not about the empirical results or the concept of the horopter itself, but about how to explain the brain’s resolution of two images into one. Helmholtz argues that the brain adjusts the retinal images by a process of “unconscious inferences.” Helmholtz contends that a child’s brain learns to respond to stimuli as the child develops, and that the brain unconsciously adjusts itself to produce a coherent experience — for instance, to resolve retinal disparities. For recent work on unconscious inference see De Kock 2014a, De Kock 2014b, Patton 2018, Patton forthcoming.