The red and near-infrared light in red light therapy itself has no harmful effect on the eyes, but looking directly into the lamp is not very comfortable as it is, after all, a very bright light. If you feel discomfort, you can also use safety glasses. It is not dangerous to stay in the same room as a bright lamp.
Dele:
Can I overdose and use red light therapy too much?
Can I use red light therapy in the evening?