Measured Changes in Limbal Strain During Simulated Sleep in Face Down Position Using an Instrumented Contact Lens in Healthy Adults and Adults With Glaucoma

Abstract

Contact with a pillow in FD position during simulated sleep produced a sustained strain increase in glaucoma eyes, particularly those eyes with past progressive visual field loss. The mean FD change in glaucoma eyes was equivalent to strain increase associated with a mean (SE) sustained IOP elevation of 2.5 (1.1) mm Hg. Further experiments are planned to determine if facial features or a protective eye shield prevents sleep position-induced limbal strains during a mean 8-hour sleep period.