This, 100%!
From the first photo you posted in this thread the eye does look a bit concave and dented. To fix this I'd recommend raising the humidity to 70% for a few days and maybe putting some damp sphagnum moss into your BP's hides. And of course make sure fresh water is available at all times. Dented eyes due to dehydration seems to be a common problem for BPs and as long as it's addressed promptly there shouldn't be any lasting issues.