Peter of Limoges (Latin: Petrus Lemovicensis or de Lemoviciis; French: Pierre de Limoges; c. 1240 – 1306) was the author of A Moral Treatise on the Eye (Latin: Tractatus Moralis de Oculo) or On the Moral Eye (De Oculo Morali), a popular guide for Catholic priests, composed at the University of Paris sometime in the 1270s or '80s. The work depended heavily on Roger Bacon's earlier treatment of optics.