A new documentary follows a couple who learn that three of their four children have retinitis pigmentosa, an incurable condition which means they will soon lose all of their eyesight. The couple decides to pull their kids from school and journey around the world, showing them all the things that soon they will no longer be able to see. Subjects and partners Edith Lemay and Sébastien Pelletier  and co-director Edmund Stenson join us to discuss the film "Blink,"  which premieres in theaters today.