There are few motifs more ubiquitous in Renaissance and Baroque poetry than those that link falling in love to the eyes. Based at least in part on Theophrastus, as Halstead has pointed out (113-20), this notion of love describes a process by which one is captivated by looking at the object of desire, prompting an exchange of humors or spirits. If the love is returned, both lovers feel complete and satisfied, but if the object of desire does not reciprocate, one feels empty because one has given one’s soul to another while receiving nothing in return.
Stroud, Matthew D. "Gender and the Gaze: Sor Juana, Lacan, and Spanish Baroque Poetry." Calíope 9.2 (2003): 61-74.