Presence of OAG in Patients with Type 2 Diabetes Raises Risk for Dementia

Among patients with consistent clinical follow-up, OAG was associated with an increased risk of incident dementia, particularly vascular and frontotemporal dementia, but no evidence of an increased risk of Alzheimer’s disease was found. OAG may function as a risk marker for selected non-Alzheimer’s dementia subtypes, reflecting shared vascular and neurodegenerative mechanisms linking ocular and cerebral pathology in the context. Photo: Julie Rodman, OD. Click image to enlarge. Many researchers have believed that open-angle glaucoma (OAG) may share underlying pathophysiological mechanisms with dementia, such as neuroinflammation and vascular dysfunction. As this disease is often diagnosed earlier, they also believe that there is a potential opportunity for identifying individuals at increased risk for subsequent cognitive decline. A study team from the University of Texas Health Science Center in Houston investigated whether OAG served as a risk indicator for dementia specifically within the type 2 diabetes mellitus population. Their results suggested that OAG could be a potential risk marker for non-Alzheimer’s dementia subtypes, particularly in this vulnerable population.A total of 1,580,368 patients with type 2 diabetes from a dataset taken over 12 years were included in the analysis. Of these, 12,405 were diagnosed with OAG. Patients with OAG were, on average, older than those without OAG. The OAG group had a higher proportion of females and a significantly larger proportion of Black patients. Among the patients with OAG, the majority (59.2%) had a disease duration of one to five years, while 29.8% had a duration of five to nine years and 4.0% had a duration of 10 to 14 years. A small minority (7.0%) had a documented duration of less than one year. OAG was treated as a time-dependent exposure in Cox proportional hazards models to account for variable onset timing relative to type 2 diabetes diagnosis.Compared to patients with type 2 diabetes and without OAG, those with OAG had significantly reduced dementia-free survival. The risk of dementia was specifically elevated in patients who developed OAG after their type 2 diabetes diagnosis (incident OAG), whereas prevalent OAG showed no evidence of increased risk and demonstrated an inverse association. After covariate adjustment, OAG was associated with a 13% increased risk of all-cause dementia (hazard ratio; HR = 1.13). Subtype-specific analysis revealed elevated risks for vascular (HR = 1.37) and frontotemporal dementia (HR = 1.39) but not an increased risk for Alzheimer’s disease (HR = 0.63). Stroke and depression were also strong independent risk factors.“These findings support the hypothesis that shared vascular and neurodegenerative processes link ocular and cerebral pathology,” the study authors wrote in their paper, which was published in American Journal of Ophthalmology. “By focusing on this high-risk population, our work fills a critical gap in the literature and highlights the potential value of ophthalmologic indicators in the early identification of cognitive decline among patients with metabolic comorbidities.”The team did note that, while their results do not support routine dementia screening solely based on OAG status, they do underscore the importance of enhancing clinical awareness and proactive management of modifiable vascular risk factors in this vulnerable patient cohort. They believe that future prospective and interventional studies are needed to validate these associations, clarify underlying mechanisms and determine whether integrating glaucoma status into predictive models can improve dementia prevention and care in vulnerable populations.Click here for the journal source. Zhou J, Lee DA, Talebi Y, et al. Risk of dementia in type 2 diabetes patients with open-angle glaucoma: insights from a nationwide real-world cohort study. Am J Ophthalmol. February 7, 2026. [Epub ahead of print]. This article was developed by the editorial staff in conjunction with experts in the field. In the process, AI may have been among the editorial tools used to meet the goals of human editors, who approved all content.