Deep Optic Nerve Head Structures Associated With Increasing Axial Length in Healthy Myopic Eyes of Moderate Axial Length - 13/04/23
, Mitsuki Kambayashi a, Makoto Araie b, Hiroshi Murata c, Nobuko Enomoto d, Tsutomu Kikawa e, Kazuhisa Sugiyama f, Tomomi Higashide f, Atsuya Miki g, h, Aiko Iwase i, Goji Tomita j, Toru Nakazawa k, Makoto Aihara a, Kyoko Ohno-Matsui l, Tae-Woo Kim m, Christopher Kai Shun Leung n, Linda M. Zangwill o, Robert N. Weinreb oRésumé |
PURPOSE |
To elucidate which swept-source optical coherence tomography (OCT)–derived optic nerve head (ONH) parameters are associated with longer axial length (AXL) in healthy myopic eyes.
DESIGN |
Prospective cross-sectional observational study.
METHODS |
Two hundred eleven healthy eyes of 140 participants (96 emmetropic-mild myopic [AXL: 22.2-24.5 mm], 83 moderately myopic [24.5-26.0 mm], and 32 highly myopic [26.0-27.4 mm] eyes) were enrolled. Bruch membrane opening (BMO), anterior scleral canal opening (ASCO) area and ovality, minimum rim width, parameters defining misalignment between the BMO and ASCO planes, OCT-defined region of perineural canal retinal epithelium atrophy and externally oblique choroidal border tissue, circumpapillary retinal nerve fiber layer thickness (cpRNFLT), circumpapillary choroidal thickness (cpChT), lamina cribrosa parameters, and peripapillary scleral (PPS) angle were calculated from BMO-centered radial scans reconstructed from 3D raster scans. Multivariate linear mixed models were used to elucidate ONH parameters that are independently associated with AXL.
RESULTS |
Longer AXL was associated with a greater misalignment between ASCO and BMO planes, larger region of externally oblique choroidal border tissue, thinner cpChT, larger PPS angle, larger ASCO area, and thicker cpRNFLT (all P < .040 after Bonferroni's correction for number of included explanatory variables).
CONCLUSIONS |
A greater misalignment between BMO and ASCO planes, thinner choroid, a more posteriorly bowed PPS, an enlargement of ASCO, and thicker cpRNFLT were each associated with longer AXL. An enhanced understanding of these AXL-associated configurations should provide essential information to improve our ability to detect glaucoma-induced ONH morphology in myopic eyes.
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Vol 249
P. 156-166 - mai 2023 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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