Association between sleep quality and corneal microstructural alterations in patients with dry eye disease: An in vivo confocal microscopy study.

Researchers examined how sleep quality affects the eye health of people with dry eye disease, specifically looking at nerve fibers and immune cells in the cornea. The study included 60 adults divided into two groups based on their sleep quality: those with poor sleep (scored above 5 on a standard sleep questionnaire) and those with good sleep (scored 5 or below). Using specialized microscopy, scientists measured the density of corneal nerve fibers and inflammatory cells in the eyes of both groups. They found that people with dry eye disease who also had poor sleep showed significantly fewer nerve fibers in their corneas and much higher levels of inflammatory immune cells compared to those with better sleep quality. Poor sleepers also reported worse dry eye symptoms and produced fewer tears. The connection was clear: worse sleep quality directly correlated with more nerve fiber loss and increased inflammation in the eye. This research suggests that poor sleep doesn't just make you tired—it actually changes the physical structure of your eyes and worsens dry eye symptoms. For patients considering acupuncture, this is particularly relevant since acupuncture has been studied for both insomnia and dry eye disease, potentially offering a dual benefit by addressing sleep quality while supporting eye health. If you're experiencing both sleep problems and dry eye symptoms, consult with a qualified, licensed acupuncturist who can develop an individualized treatment plan addressing both conditions.

This cross-sectional study (n=60) utilized in vivo confocal microscopy to evaluate corneal microstructural changes in dry eye disease (DED) patients stratified by Pittsburgh Sleep Quality Index scores. The sleep disorder cohort (PSQI >5) demonstrated significantly reduced corneal nerve fiber density (11.05±1.65 vs. 13.05±1.44 mm/mm²; P<0.05) and elevated dendritic cell density (median 45 vs. 28.5 cells/mm²; P<0.05) compared to controls. CNFD showed negative correlations with PSQI (r=-0.27) and Insomnia Severity Index (r=-0.41), while DC density exhibited strong positive correlations with sleep indices (P<0.001). Multivariate regression identified Schirmer I test as a positive predictor for CNFD and ISI score as an independent risk factor for increased DC density. Clinical implications suggest sleep disturbances contribute to corneal neuropathy and inflammatory infiltration in DED. This supports integrating sleep assessment and intervention, including acupuncture protocols targeting both insomnia and ocular surface health, into comprehensive DED management strategies.