Blue Light

Blue light blocking glasses and other products that block blue light promise to improve eye health along with many other questionable claims. The evidence is lacking. Blue light is part of the spectrum of sunlight. Other sources include digital screens (TVs, computers, laptops, smart phones and tablets), electronic devices, and fluorescent and LED lighting. We

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

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