Optical code of M. Bulgakov: to the problem of the poetic language

There is researched the optical component of Bulgakov's plot which functions as systemic code that is manifested by the images of cock, snake and their derivatives. By actualizing as key words "focus", "montage" and "propiska" the principle of double (mirror image) Bulgakov's optics is explained; the basis of it has the collision of sight and blindness.