The disclosure is directed to devices for training the human brain to overcome the effects of amblyopia. Some examples include a divider placed between the left eye and the right eye of a user or wearer. Such examples reduce the portion of a user's field of vision of each eye that overlaps, which in turn reduces the degree to which the brain can rely on input from the dominant eye to compensate for poor vision in the weak eye. Some examples include an obstruction element that covers a portion of the field of vision of the dominant eye. Such devices convert binocular fields of view into bi-monocular fields of view. Such devices help a user to overcome the effects of amblyopia by training the brain to better utilize and integrate visual information from the weak eye.