Sleeping Pillow-Free May Lower Eye Pressure in Glaucoma
A study of 144 glaucoma patients found that elevating the head with pillows raises intraocular pressure (IOP) and lowers ocular perfusion pressure (OPP) for many participants, suggesting neck position and jugular vein compression may affect eye drainage; sleeping flat or without a pillow could be a simple adjunct strategy to manage postural IOP, but the study is observational and not proof of causation; results varied by age and glaucoma type, requiring more research.