Bo Schmidt

Purpose To compare bleb morphology after trabeculectomy using a visual grading system, the Indiana Bleb Appearance Grading Scale (IBAGS) and anterior segment optical coherence tomography (AS-OCT). Methods Fifty-seven patients who underwent trabeculectomy were included in this study. Clinical evaluations of the bleb and imaging with anterior segment OCT were conducted 12 months postoperatively. Bleb assessments were performed using a slit-lamp microscope with the IBAGS and a 3D AS-OCT CASIA2.

1 INTRODUCTION Glaucoma is one of the leading causes of irreversible blindness globally (Bourne et al., 2021). It is a progressive optic neuropathy characterized by loss of nerve fibres in the optic nerve head, leading to visual field defects. The disease is believed to be caused by mechanical compression and reduced blood supply to the optic nerve head and retina, resulting in atrophy of the optic nerve fibres and loss of retinal ganglion cells and nerve fibres.

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