ArticleEye (London, England)2026
Comparative analysis of quantitative fundus results of the left and right eyes and screening for coronary atherosclerotic disease: a binocular study.
Article in Eye (London, England), 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
backgroundRetinal microvascular parameters are potential biomarkers for systemic vascular health. This study aimed to assess the interocular consistency of these parameters in patients with coronary atherosclerotic disease(CAD) using AI-based quantitative analysis.
methodsWe analysed 862 colour fundus photographs from 431 patients. Retinal vascular parameters-including fractal dimension (FD), vessel density (VD), and vessel diameters-were automatically measured using a ResNet 101-UNet deep learning model. Interocular symmetry was compared across groups stratified by Gensini score, CAD presence, and lesion location. Correlation was assessed using Pearson and intraclass correlation coefficients (ICC).
resultsExcept for minor curvature variations in the overall population, no statistically significant interocular differences were found across any subgroups (Gensini scores, CAD vs. Non-CAD, or vessel location; all P > 0.05). All variables demonstrated good interocular consistency, with Pearson coefficients ranging from 0.387 to 0.833 and ICCs from 0.384 to 0.824. While linear regression suggested minor associations between gender and interocular differences in VD and mean branch angle, generalised linear mixed models-adjusting for age, gender, and clinical history-confirmed no significant interocular variance in fundus metrics across all subgroups (P > 0.05).
conclusionRetinal vascular parameters exhibit high interocular symmetry in individuals regardless of their CAD status. These findings suggest that single-eye imaging may potentially represent retinal vascular status in cardiovascular risk assessment. This approach could help streamline screening protocols and provides a rationale for the standardised use of fundus examination as a non-invasive auxiliary tool for CAD evaluation.
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