The presentation focuses on two medieval models of active perception, i.e. the theories based on the presumption that our sensory powers are somehow active in the perceptual process. The first account developed by Franciscan thinker Peter Olivi (ca. 1248?1298) presupposes that every perceptual act demands a preceding focusing of our mind?s attention. In describing the attention Olivi reinterprets the heritage of extramissionist theories of vision that postulate a visual ray coming out of our eyes. According to Olivi, there is no actual corporeal ray that would emanate from our eyes and travel through the surrounding medium to the object seen. However, the visual ray theory still provides a useful model for explanation of attention and attentional shifts. According to the second account propounded by another Franciscan thinker, Peter Auriol (ca. 1280?1322), the perception is active since it produces its content. Our senses not only receive an information from our environment, but also actively process it and produce perceptual content ? or, in Auriol?s words, put the external object into apparent being. The peculiar feature of Auriol's conception is that he seems to endorse that the perceptual content is both dependent of our perceptual activity and outside of our senses. The merits and weaknesses of both Olivi?s and Auriol?s theories of active perception will be considered (besides other ones) in the context of the question what does it mean to see a mirror-image of actual thing and how to explain such a visual experience.