In preparation for her role, Brit Marling befriended a man who went blind at age 19 to tutor her in coping with the day-to-day chores of a typical blind person. The couple would meet in downtown Manhattan and she would spend up to 6 hours per day learning how to clean an apartment, make an omelet, etc. Throughout these sessions Brit would be blindfolded.
In episode 2, "New Colossus," when Prairie and her parents are taking a family photo, we hear the photographer say, "...Prairie, toward the sound of my voice, honey..." to get her attention. The Sound of My Voice (2011) is the first feature-length film by both Zal Batmanlij and Brit Marling.
When the OA is watching the video of Homer getting paralyzed the lady says Pershing college qb almost brought a championship to Missouri etc. That's actually a video of Kansas st vs Texas. FYI Kansas St is in Manhattan, Kansas.