Dennis Gross LED mask

I got the Dennis Gross LED mask and used it last night for the first time, first on the red light and then on the blue light. The light felt so bright in my eyes, lowkey even when I closed them. Once the six minutes were up I could see just fine, so I’m probably just being paranoid, but does anybody have thoughts on whether this can damage vision even if used as recommended?

The instruction manual says not to use it if you have eye issues, which I don’t as far as I know (other than needing to use glasses/contacts), but that makes me feel like it can actually affect eyes.

thanks :)