Father,

Not a word I use, but a legitimate one all the same:

The verb 'unblind':
http://www.dictionary.com/cgi-bin/dict.pl?term=unblind

The adjective 'unblinded':
http://www.m-w.com/cgi-bin/dictionary?va=unblinded

The medical usage at http://www.smartlink.net/~martinjh/ch_glos.htm#u
UNBLIND
To reveal the treatment assignment of an individual patient or group of patients to an individual or group of individuals associated with the trial (e.g., patients, study physicians, treatment effects monitoring committee) who have heretofore been denied this information.

What I'd like to know is - can a window be unblinded, and if so, is it also undressed?