 In the lantern, the flame is shielded by a linen screen, but the light still goes through the linen. So the eye has a membrane through which the flame within the eye goes out. This account of the eye refers to another important Empedoclean idea: the surface of the eye has passages through which the effluent fire goes out. Still, effluences go in the other direction, as well, from the objects. This possibility suggests another important Empedoclean idea. In a well-known passage of Plato’s Meno where Socrates is supposed to be giving Empedocles’ theory of perception, effluences come from the object of perception to the organ of perception. In this account there is also a way to distinguish the different kinds of perception. Different sized effluences from the object fit similarly shaped openings or pores in the different organs. Then colors are effluences from objects fitted to the pores of the eye (A 92 = D 209). So, perception of color is based on a correspondence between the shape of the pores in the eye and the shape of the particles that flow from the perceived object.