Nyctalopian Lenses

A City Improvement unlocked from the Nyctalopian Lenses Blessing, available at the start of the 1st Winter.

The Forgotten are able to unlock and construct the Nyctalopian Lenses, but the bonus to Science has no effect, making the construction less valuable to them than other factions.

Lore
A simple modification to windows in public buildings (simple if you master Pearls and Dust magics, that is) allows those within to see movement at night as well as they can in daytime.