BUENOS AIRES, Argentina — Leandro Granato considers himself the creator of the "eye painting" technique, by which he drips and squirts paint made of vegetable dyes from his tear ducts to produce composed, colorful works of art. "I’m not a freak and this isn’t a freak show," he says. "When I was 19 I lost my grandfather to cancer, and this made me take up art as a form of therapy." But his methods are decidedly unconventional.