vision strip
n.— «Indeed, during the 1970s, many districts, including San Diego Unified, began to construct new schools with no windows. Educators argued that windows prevented students from concentrating; architects of these schools created “vision strips,” as they called them, thin slots at the tops of the walls that allowed some light to come into the room, but nothing else.» —“Going beyond No Child Left Behind” by Richard Louv San Diego Union-Tribune (California) Jan. 31, 2006. (source: Double-Tongued Dictionary)
Further reading
Trivia time! Where in the United States can you visit Soda City? If you answered Columbia, South Carolina, you’re right! This nickname apparently derives from an old practice of abbreviating Columbia as Cola. The locals then referred to the town as...
If you speak a second or third language, you may remember the first time you dreamed in that new tongue. But does this milestone mean you’re actually fluent? And a couple’s dispute over the word regret: Say you wish you’d been able...