From the American Academy of Ophthalmology

This large retrospective study evaluated whether asymmetric visual field loss in glaucoma patients can be attributed to their favored sleeping position. Subjects had well-controlled IOP in the sitting position and a difference in mean deviation between the two eyes of at least 2 dB. Among the normal-tension glaucoma patients who preferred side-sleeping, 66 percent favored the worse eye-dependent lateral decubitus position (P =.001), while 71.9 percent of high-tension glaucoma patients preferred the worse eye–dependent lateral decubitus position (P = .013). American Journal of Ophthalmology, March 2014