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Elevating head while sleeping raises eye pressure in glaucoma patients, possibly worsening nerve damage.
A study of 144 people with glaucoma finds that sleeping with the head elevated using two pillows increases eye pressure by an average of 1.61 mm Hg compared to lying flat, potentially worsening optic nerve damage.
Researchers link this rise to neck flexion compressing the jugular vein, reducing blood flow and fluid drainage from the eye.
Ultrasound scans on 20 healthy volunteers showed narrowed jugular veins when the head was raised.
The findings suggest sleeping without pillows or using just one thin pillow may help manage intraocular pressure, though further research is needed to confirm benefits.
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Elevar la cabeza mientras duerme aumenta la presión ocular en pacientes con glaucoma, posiblemente empeorando el daño a los nervios.