Graham Isador is a Canadian writer and playwright who’s living with a degenerative eye disease called keratoconus, which means he’s losing his sight. But since there’s no obvious sign of it, people don’t always believe him. His new project, “Short Sighted,” started as a one-man play and is now a five-part podcast series that explains what it’s really like for him to lose his vision. Graham joins guest host Talia Schlanger to talk about the project and what he’s learned about himself along the way.