Have you seen this? It's an excellent, disturbing documentary about a New York lawyer who had an obsessive love affair with a woman in the 1950s. Highly recommended!
*** SPOILERS AHEAD ***
The woman ends up breaking off the relationship when she finds out the guy is married and he lies to her about getting a divorce. The guy freaks out and eventually hires someone to throw lye in the woman's face. She loses most of her vision and her eyes become horribly scarred. The guy gets convicted and goes to prison. Years later, he gets paroled and convinces the woman, who is now totally blind, to marry him!