Hi. ?My?ophthalmologist advised me to avoid positions like hanging from my feet or any that would make my face turn red and the blood vessels stand out. He advised that impairment of blood flow is felt?too possibly contribute toward vascular changes in the eye, especially glaucoma and other conditions. ?So I avoid exercises where this would happen and I no longer lay my head in a massage cradle when I get a massage. ? ?I would check with your ophthalmologist.