"Persiana Americana" is a song by Soda Stereo, written by Gustavo Cerati/Jorge Daffunchio.
It's from their album Signos (1986) and It's one of the band's classic themes and one of their greatest hits.
The lyrics are about someone's desire while observing a woman through an american blind (persiana americana).
Yo te prefiero fuera de foco
Yo te prefiero irreversible