Alyssa Coppelman spotlights the work of Robyn Twomey, who began documenting medical marijuana smokers in late 2009:

Ann (pictured at top with her cat) received a prescription for medical marijuana as soon as it was available. She uses it to treat chronic back and neck pain resulting from a childhood accident that fractured her spine. When it healed, her spine became misaligned and has given her increasing trouble as she ages. She believes more elderly people could benefit from the use of cannabis should it be legalized and destigmatized.

(Photo by Twomey, courtesy of Patricia Sweetow Gallery)