Visual Stress

The Opticalm Clinic claims to diagnose and treat visual stress with colored lenses and other aids. Visual stress is a poorly defined, questionable condition and Opticalm’s claims are not backed by scientific evidence. What does “visual stress” mean? It appears to be a new term for what has also been called Irlen syndrome (described by Steve Novella

A Credible Placebo Control for Chiropractic Research

The research on chiropractic has been far from rigorous. One of the problems is that studies of spinal manipulation therapy (SMT) can’t be double blinded, and it is very difficult to even do single blinding. So most studies resort to non-manipulation control groups like “usual care” or “wait list” or “pain medication.” Those studies are

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