reSee.it Video Transcript AI Summary
Researchers recruited 22 individuals and randomized them into two groups: control and experimental. Both groups had a baseline color contrast test, which assesses visual function. Participants worked in a building with abundant artificially lit LEDs and fluorescent lighting, a spectrum with a big spike in blue light and very low red light and zero infrared light. After two weeks of working under these conditions—described as conditions the participants had experienced for the last two years—there were zero improvements in color contrast in the control group.
In the experimental group, researchers added two desk lamps, each equipped with a 60-watt incandescent bulb. The incandescent bulbs provided a spectrum that added abundant infrared light, introducing longer wavelengths similar to sunlight. After two weeks of this infrared light supplementation, color contrast tests were retaken. The experimental group showed a 28% improvement in protan thresholds and a 24% improvement in tritan thresholds. After the incandescent lights were removed, improvements persisted four weeks later and six weeks later, with no other changes to the lighting.
The mechanism behind these results centers on retinal energy metabolism. The retina is rich in mitochondria, requiring substantial energy. The electron transport chain in mitochondria handles energy transformation. Two scenarios are described: shining red and infrared light on mitochondria versus blue light.
- Blue light: Absorbed by porphyrins in the mitochondria, leading to the production of reactive oxygen species (ROS). Excess ROS reduce ATP production, diminishing energy available to retinal cells and impairing function.
- Red and infrared light: Absorbed by cytochrome c oxidase and by nano water around ATP synthase. Absorption releases nitric oxide, allowing oxygen to enter and form water. The longer wavelengths are also absorbed by nano water around ATP synthase, reducing viscosity and enabling the rotor to run faster, generating more ATP and providing more energy for retinal cells to function properly.
The speaker attributes the observed improvements to these mitochondrial light–energy interactions, particularly the enhanced ATP production from red and infrared light.
A practical takeaway is proposed: add incandescent lighting to the environment.