ArticleOphthalmology science2026
The Association between Saccadic Eye Movement Parameters and Mild Cognitive Impairment: The Nagahama Study.
Article in Ophthalmology science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: The early identification of mild cognitive impairment (MCI) is crucial in preventing dementia progression, making reliable cognitive screening tools essential. This study was conducted to examine the relationship between saccadic eye movement parameters and MCI using a novel eye-tracking device, the gaze-analyzing perimeter (GAP) screener, which records saccadic eye movements precisely without large equipment or dark rooms. Design: Cross-sectional study. Participants: We used the data set from the Nagahama Prospective Cohort for Comprehensive Human Bioscience conducted between 2017 and 2023. A total of 1202 participants aged ≥59 years who completed both the cognitive assessment using the Japanese version of the Montreal Cognitive Assessment and the gaze-tracking assessment using GAP were included. Methods: Saccadic parameters such as reaction time, latency, the number of saccades, and gain were analyzed, and participants were divided into the MCI and non-MCI groups based on a Japanese version of the Montreal Cognitive Assessment score threshold of 25. Logistic regression models adjusted for possible confounders were used to evaluate the association between MCI and saccadic eye movement parameters as measured using GAP. Genome-wide association study was performed for reaction time. Main Outcome Measures: The association between MCI and saccadic eye movement parameters obtained using GAP. Results: The average age of participants was 70.9 ± 5.6 years. The MCI group included 557 (46.3%) participants. When the participants were divided into 3 groups based on reaction time tertiles, the percentage of individuals with MCI was 34% in Tertile 1, 47% in Tertile 2, and 59% in Tertile 3, with a higher proportion in groups with longer mean reaction times ( Conclusions: The MCI group exhibited longer reaction times, longer latencies, and smaller end gains in saccadic movements than the non-MCI group, even after adjusting for possible confounders. These findings suggest that saccadic eye movement parameters, particularly mean reaction time, may serve as biomarkers for identifying MCI. Financial Disclosures: Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.
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