When photographer Phil Toledano's mother died in 2006, Phil - an only child - became his father's main caregiver. Phil started taking photos of him too. In the beginning, he says, "I was taking photographs for myself. I was recording something for myself." But when he started sharing the pictures online, the response was overwhelming.
You can hear an edited version of his conversation with Anne Strainchamps below, or click here to see a slideshow of these images and hear an extended interview.