Structural Characterization of Glaucoma Patients with Low Ocular Blood Flow

Kazuko Omodaka, Shunsuke Fujioka, Guangzhou An, Takuma Udagawa, Satoru Tsuda, Yukihiro Shiga, Soichiro Morishita, Tsutomu Kikawa, Kyongsun Pak, Masahiro Akiba, Hideo Yokota, Toru Nakazawa

Research output: Contribution to journalArticle

Abstract

Purpose: There is an unclear relationship between ocular blood flow (OBF) and the structural characteristics of the optic nerve head (ONH) in glaucoma, a multifactorial disease. This study used laser speckle flowgraphy (LSFG) to identify low-OBF glaucoma patients and investigated the ONH in these patients. Materials and Methods: In 533 eyes with glaucoma, we determined confounding factors for LSFG-measured OBF (tissue-area mean blur rate: MT) and corrected MT with a linear mixed-effects model (LMM). Structural ONH data (from fundus stereo photography), OCT data, and clinical characteristics were then compared in patients with corrected MT in the upper and lower quartiles using the LMM. Results: Single regression showed significant correlations between MT and age, spherical equivalent (SE), central corneal thickness (CCT), and a weighted count of retinal ganglion cells (wRGC), but not axial length or systemic blood pressure. Gender also significantly influenced MT; MT was corrected for these correlated factors and also glaucoma type with the LMM. The lower-quartile MT group had a significantly larger cup area and cup-disc area ratio and lower temporal quadrant circumpapillary retinal nerve fiber layer thickness (cpRNFLT) and macular ganglion cell complex (GCC) than the upper-quartile group. Conclusions: Low-OBF glaucoma patients were characterized by a larger cup-disc ratio, and higher susceptibility to damage in the temporal disc and the macular area.

Original languageEnglish
JournalCurrent Eye Research
DOIs
Publication statusAccepted/In press - 2020 Jan 1

Keywords

  • glaucoma
  • Ocular blood flow
  • optical coherence tomography
  • quantitative topography
  • stereo photography

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

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    Omodaka, K., Fujioka, S., An, G., Udagawa, T., Tsuda, S., Shiga, Y., Morishita, S., Kikawa, T., Pak, K., Akiba, M., Yokota, H., & Nakazawa, T. (Accepted/In press). Structural Characterization of Glaucoma Patients with Low Ocular Blood Flow. Current Eye Research. https://doi.org/10.1080/02713683.2020.1736306