Structural Characterization of Glaucoma Patients with Low Ocular Blood Flow. (2nd October 2020)

• Record Type: Journal Article
• Authors: Omodaka, Kazuko; Fujioka, Shunsuke; An, Guangzhou; Udagawa, Takuma; Tsuda, Satoru; Shiga, Yukihiro; Morishita, Soichiro; Kikawa, Tsutomu; Pak, Kyongsun; Akiba, Masahiro; Yokota, Hideo; Nakazawa, Toru
• Is Part Of: Current eye research. Volume 45:Number 10(2020)
• Page Start: 1302
• Page End: 1308
• Publication Date: 2020-10-02
• Subjects: Ocular blood flow -- optical coherence tomography -- stereo photography -- quantitative topography -- glaucoma; Ophthalmology -- Periodicals; Eye -- Diseases -- Periodicals; Ophthalmology -- Periodicals; 573.88
• DOI: 10.1080/02713683.2020.1736306
• Languages: English
• ISSNs: 0271-3683

Abstract

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.