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• W4381252693 abstract "PurposeWe employed automated image analysis of scanning laser ophthalmoscopy (SLO) to investigate mechanical strains imposed on disc, and retinal and choroidal vessels during horizontal duction in adults.DesignDeep learning analysis of optical images.MethodsThe peripapillary region was imaged by SLO in central gaze, and 35° ab- and adduction, in younger and older healthy adults. Automated image registration was followed by deep learning-based optical flow analysis to track determine local tissue deformations quantified as horizontal, vertical, and shear strain maps relative to central gaze. Choroidal vessel displacements were observed when fundus pigment was light.ResultsStrains in the retina and disc could be quantified in 22 younger (26±5 years, ±SEM) and 19 older (64±10 years) healthy volunteers. Strains were predominantly horizontal and greater for adduction than abduction. During adduction, maximum horizontal strain was tensile in the nasal hemi-disc, and declined progressively with distance from it. Strain in the temporal hemi-retina during adduction was minimal, except for compressive strain on the disc of older subjects. In abduction, horizontal strains were less and largely confined to the disc, greater in older subjects, and generally tensile. Vertical and shear strains were small. Nasal to the disc, choroidal vessels shifted nasally relative to overlying peripapillary retinal vessels.ConclusionsStrain analysis during horizontal duction suggests that the optic nerve displaces the optic canal, choroid, and peripapillary sclera relative to the overlying disc and retina. This peripapillary shearing of the optic nerve relative to the choroid and sclera may be a driver of disc tilting and peripapillary atrophy." @default.
• W4381252693 created "2023-06-20" @default.
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• W4381252693 date "2023-10-01" @default.
• W4381252693 modified "2023-10-12" @default.
• W4381252693 title "Scanning Laser Ophthalmoscopy Demonstrates Disc and Peripapillary Strain During Horizontal Eye Rotation in Adults" @default.
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• W4381252693 doi "https://doi.org/10.1016/j.ajo.2023.06.008" @default.
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