How to use red light safely?

To use red light safely, it is important to ensure that the light source is not so bright that it causes discomfort or pain when looked at. Red light should be safe to view if it doesn't cause you to squint or want to close your eyes. A key point is that retinal neurons, which are damaged by excessive light exposure, do not regenerate, so protecting your eyes is crucial. For specific wavelengths, red light of 670 nanometers and near-infrared light of 790 nanometers have been found effective. Most commercial red light panels are designed primarily for skin illumination and are too bright for safe direct eye exposure. Therefore, they often come with eye protectors to block the light. To explore red and near-infrared light therapy safely, set the light source at a distance that is comfortable, and never force yourself to endure uncomfortable brightness. It's advisable to consult with an eye care professional before starting any extensive use of red light therapy 1.