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Related Experiment Videos

Absence of Association Between Glaucoma and Stroke Risk: Insights From a Cross-Sectional Study and a Two-Sample

Yanan He1, Qingke Shi1, Dandan Chang2

  • 1Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing, 100853, China, 301hospital.com.cn.

Journal of Ophthalmology
|May 25, 2026
PubMed
Summary

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
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Glaucoma: Overview

Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...

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This study found no causal link between glaucoma and stroke risk. Both observational and genetic analyses confirmed no association, clarifying the relationship between these conditions.

Area of Science:

  • Ophthalmology
  • Neurology
  • Genetic Epidemiology

Background:

  • Observational studies suggest a link between glaucoma and stroke risk.
  • The causal nature of this association remains uncertain.
  • Understanding this relationship is crucial for public health.

Purpose of the Study:

  • To investigate the causal association between glaucoma and stroke.
  • To integrate population-based cross-sectional data with Mendelian randomization (MR).
  • To assess both observational and genetic evidence for the glaucoma-stroke link.

Main Methods:

  • Cross-sectional analysis using National Health and Nutrition Examination Survey (NHANES) data (2005-2008).
  • Multivariable logistic regression models adjusted for risk factors.
Keywords:
Mendelian randomizationcausal associationgenetic analysisglaucomastroke

Related Experiment Videos

  • Two-sample Mendelian randomization (MR) analysis using large-scale genome-wide association studies (GWAS) summary statistics.
  • Inverse-variance weighted (IVW) method with sensitivity analyses.

    • Main Results:

    • NHANES analysis (n=1312) showed no significant association between glaucoma and stroke.
    • MR analyses revealed no evidence of a causal association between genetically predicted glaucoma and stroke or its subtypes.
    • Null findings were consistent across various MR methods and sensitivity analyses.

    Conclusions:

    • This study provides no evidence for a causal relationship between glaucoma and stroke.
    • Complementary observational and genetic approaches strengthen these findings.
    • The results offer new insights into the genetic epidemiology of glaucoma and stroke.