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blind 'blīnd adj
1 a) lacking or deficient in sight esp having less than 1/10 of normal vision in the more efficient eye when refractive defects are fully corrected by lenses
b) of or relating to sightless persons <\blind care>
2 a) made or done without sight of certain objects or knowledge of certain facts that could serve for guidance or cause bias <a \blind taste test> <a \blind clinical trial> see DOUBLE-BLIND, SINGLE-BLIND
b) having no knowledge of information that may cause bias during the course of an experiment or test <researchers \blind to whether the investigational drug is administered>
3) having but one opening or outlet <the cecum is a \blind pouch>
blind vt to make blind
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(blīnd) [A.S. blind] 1. not having the sense of sight; see blindness. 2. pertaining to a clinical trial or other experiment in which one or more of the groups receiving, administering, and evaluating the treatment are unaware of which treatment any particular subject is receiving. Some authorities prefer the term masked to avoid confusion with physical blindness. See single blind, double blind, and triple blind. Cf. open.Medical dictionary. 2011.