I see, so anytime of the day my grandmother can use this. I am not particularly interested personally in red light therapy, but after reading the comments. I think I am being convinced to try it out too.
Can you suggest something that can be worn even with eye glasses on? I will let my grandmother use RLT and reading the information you have posted, I want her to protect her eyes as well. Is there anything that can be used even with eye glasses on?