ArticleInternational journal of retina and vitreous2026
Structural and microvascular retinal changes following bariatric surgery: a prospective study.
Article in International journal of retina and vitreous, 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
backgroundThis study sought to evaluate structural retinal changes, mainly microvascular ones, in obese patients undergoing bariatric surgery.
methodsObese patients who were candidates for bariatric surgery at University of São Paulo Medical School Clinics Hospital were recruited. Each participant underwent ophthalmic evaluation with ultra-widefield retinography, optical coherence tomography (OCT) and optical coherence tomography angiography (OCTA) obtained within one month before and six months following the surgical procedure. Structural OCT parameters (subfoveal choroidal thickness, mean peripapillary nerve fiber layer thickness, central foveal thickness, and macular volume) and OCTA parameters (peripapillary vascular density, macular vascular density, area, perimeter and circularity of the foveal avascular zone - FAZ - of both superficial and deep vascular complexes) were calculated and compared.
results42 participants were included (83.3% female, mean age 47 years) of whom 24 (57.14%) were diabetic and 18 (42.86%) were non-diabetic. Of this sample, 81 eyes were evaluated. Six months after bariatric surgery, a significant increase in central foveal thickness (from 258±26 μm to 260±25 μm, p < 0.001), macular volume (from 8.6 ± 0.4 mm³ to 8.7 ± 0.4 mm³, p < 0.001), peripapillary vascular density (from 63 ± 8% to 65 ± 8%, p = 0.003) and macular vascular density in the superficial (from 27 ± 4.7% to 28 ± 4.4%, p = 0.005) and deep vascular complexes (29 ± 3.9% to 31 ± 3.5%, p < 0.001) were observed. No significant changes were detected in the metrics of the FAZ, subfoveal choroidal thickness and mean peripapillary nerve fiber layer thickness.
conclusionsIn this study, bariatric surgery was associated with improved retinal microvascular perfusion, as demonstrated by the increase in macular and peripapillary vascular density. The increase in central foveal thickness and macular volume may be secondary to improved microvascular perfusion.
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