unblind
v.— «When a patient is on a double-blind study, there are certain times when the doctor needs to “unblind” them, which is just revealing whatever crap the patient was getting: drug or placebo, etc.» —“Dreamlike Occurrences That Were Not Actually Dreams” Izzle Pfaff Apr. 22, 2004. (source: Double-Tongued Dictionary)
Further reading
Book recommendations and the art of apology. Martha and Grant share some good reads, including an opinionated romp through English grammar, a Spanish-language adventure novel, an account of 19th-century dictionary wars, and a gorgeously illustrated...