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Canonical Source · peer reviewed study
This page documents how this source is reused across Claim by Claim. A source can support, challenge, qualify or contextualize different claims; appearing here does not imply endorsement of every linked proposition.
Evidence context
Evidence roles describe what this source helps establish inside each Investigation. They are local to that use, not permanent labels attached to the publication itself.
Investigation
Five leading iridologists reviewing randomized iris photographs of 39 gallbladder-disease cases and 39 matched controls achieved median validity of 51%, sensitivity of 54% and specificity of 52%, with poor inter-performer consistency.
Results were close to chance and directly tested a location on the iris claimed to correspond to the gallbladder.
Subject families