Dr. Laura's Blog

Technology continues to transform the way we understand and support our wellness. One of the most exciting developments in this area is Transdermal Optical Imaging (TOI), the technology behind the Visera Wellness Scan. The Foundation: Photoplethysmography The science behind TOI can be traced back to a technology called photoplethysmography (PPG). PPG measures changes in blood flow by detecting how light is absorbed and reflected by blood vessels beneath the skin. This same pr