Sleep

Association of ocular symptom burden with sleep quality and psychological distress in patients with primary glaucoma: A cross-sectional study.

TL;DR

Ocular symptom burden showed small bivariate correlations with sleep quality and psychological distress in primary glaucoma patients, but covariate-adjusted associations were imprecise and not statistically significant.

Key Findings

Approximately half of the primary glaucoma patients in this study screened positive for poor sleep quality.

  • 208 consecutive adults with primary glaucoma were analyzed (mean age 59.3 ± 15.0 years; 52.9% female).
  • PSQI global score averaged 5.81 ± 2.64.
  • 51.9% met the PSQI > 5 threshold for poor sleep (108/208; 95% CI 45.2%–58.6%).
  • Mean sleep efficiency was 90.6 ± 11.0%.

A substantial minority of primary glaucoma patients showed mild-to-severe psychological distress.

  • K10 (Kessler-10) averaged 15.2 ± 4.9 on a scale of 10–50.
  • 16.3% of patients had mild-to-severe distress, defined as K10 ≥ 20.
  • The sample included 55.3% primary open-angle glaucoma and 44.7% primary angle-closure glaucoma.

Ocular symptom burden (OSB) had small but statistically significant bivariate correlations with both sleep quality and psychological distress.

  • OSB count correlated with PSQI global score (r = 0.16, P = .022) and OSB severity also correlated with PSQI (r = 0.14, P = .038).
  • OSB correlated more strongly with K10 psychological distress scores (r = 0.23, P = .0007).
  • Mean OSB severity was 34.9 ± 17.4 (on a scale of 0–80).
  • Correlations were tested using Spearman correlation with Benjamini-Hochberg false discovery rate correction.

The ocular-surface/irritation and pain symptom domain correlated with sleep quality, whereas visual-function/glare domains did not.

  • The ocular-surface/irritation symptom and pain domain correlated with PSQI (r = 0.16, P = .019).
  • Visual-function/glare domains did not significantly correlate with PSQI (P > .20 for both).
  • OSB was derived from 20 bilateral ocular-symptom items.

After adjusting for covariates, OSB severity was not independently associated with poor sleep quality or psychological distress.

  • In adjusted models, standardized OSB severity had a positive point estimate for PSQI (β = 0.31, 95% CI −0.04 to 0.66; P = .080) but was not statistically significant.
  • OSB severity was not independently associated with poor sleep (PSQI > 5; OR = 1.22, 95% CI 0.92–1.62; P = .165).
  • OSB severity was not independently associated with K10 total (β = 0.56, 95% CI −0.12 to 1.24; P = .109) or distress category (K10 ≥ 20; OR = 1.03, 95% CI 0.72–1.48; P = .868).
  • Multivariable models used heteroskedasticity-consistent robust standard errors and adjusted for age, sex, glaucoma subtype, disease course, vision grade, and visual-field grade.

The authors suggest that brief screening for sleep quality and psychological distress may be considered in glaucoma care.

  • Approximately half of participants screened positive for poor sleep (PSQI > 5).
  • The study was a single-center cross-sectional design with 208 patients, limiting causal inference.
  • The authors note the association findings were 'imprecise and not statistically significant' after adjustment.
  • Visual acuity, visual field index, and intraocular pressure were obtained from chart data.

What This Means

This research examined whether the everyday eye symptoms experienced by glaucoma patients — such as eye irritation, pain, and visual disturbances — are linked to sleep problems and psychological distress. The study surveyed 208 adults with primary glaucoma at a single center, measuring their symptom burden, sleep quality using the Pittsburgh Sleep Quality Index, and psychological distress using the Kessler-10 scale. Key findings showed that about half of all patients had poor sleep quality, and roughly 1 in 6 had mild-to-severe psychological distress, highlighting that these problems are common in this population. When looking at raw relationships, greater ocular symptom burden was modestly linked to worse sleep and higher psychological distress, with a somewhat stronger link to psychological distress. Notably, it was the pain and eye-surface irritation symptoms — not visual problems like glare — that were associated with sleep disturbance. However, once the researchers accounted for factors like age, sex, glaucoma type, and disease severity, the relationship between symptom burden and either sleep quality or psychological distress was no longer statistically significant, meaning symptom burden alone did not independently explain these outcomes. This research suggests that sleep problems and emotional distress are prevalent among glaucoma patients and may warrant routine screening in eye care settings. However, the connection between eye symptoms specifically and these outcomes appears to be more complex than a simple direct relationship, and other patient factors likely play important roles. Because this was a single-center cross-sectional study (a snapshot in time), it cannot establish whether eye symptoms cause poor sleep or distress, and future longitudinal research would be needed to better understand these relationships.

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Citation

Wang W, Wang Y. (2026). Association of ocular symptom burden with sleep quality and psychological distress in patients with primary glaucoma: A cross-sectional study.. Medicine. https://doi.org/10.1097/MD.0000000000048088