Optical Microangiography and Progressive Ganglion Cell–Inner Plexiform Layer Loss in Primary Open-Angle Glaucoma

• Published in: American journal of ophthalmology Vol. 238; pp. 36 - 44
• Main Authors: Rao, Harsha L., Dasari, Srilakshmi, Puttaiah, Narendra K., Pradhan, Zia S., Moghimi, Sasan, Mansouri, Kaweh, Webers, Carroll A.B., Weinreb, Robert N.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.06.2022; Elsevier Limited
• Subjects: Algorithms; Blood vessels; Cataracts; Diabetic retinopathy; Glaucoma; Glaucoma, Open-Angle - diagnosis; Humans; Intraocular Pressure; Medical imaging; Nerve Fibers; Optics; Retinal Ganglion Cells; Tomography, Optical Coherence - methods; United States > US; California
• ISSN: 0002-9394; 1879-1891
• DOI: 10.1016/j.ajo.2021.11.029

To evaluate the association between optical microangiography (OMAG) measurements and progressive ganglion cell–inner plexiform layer (GCIPL) loss in patients with primary open-angle glaucoma (POAG). Prospective case series. Sixty-three eyes of 38 patients with POAG were studied for ≥2 years and with ≥ 3 optical coherence tomography examinations. Only those hemifields with mild to moderate functional damage at baseline (106 hemifields) were included in the analysis. OMAG imaging was performed at the baseline visit. The effects of clinical parameters (age, gender, central corneal thickness, presence of disc hemorrhage, and mean and fluctuation of intraocular pressure), baseline mean deviation, retinal nerve fiber layer, and GCIPL thickness and baseline OMAG measurements (peripapillary and macular perfusion density [PD] and vessel density [VD]) on the rate of change of GCIPL thickness were evaluated using linear mixed models. Average (± standard deviation) mean deviation, quadrant retinal nerve fiber layer, and sector GCIPL thickness of the analyzed hemifields respectively at baseline were −5.2 ± 2.8 dB, 94.5 ± 20.0 µm, and 72.4 ± 8.7 µm, respectively. Peripapillary PD and VD in the quadrant were 43.1% ± 7.0% and 17.0 ± 2.6 mm/mm2, respectively. Macular PD and VD in the quadrant were 37.2% ± 6.9% and 15.1 ± 2.6 mm/mm2, respectively. Rate of sector GCIPL change was −0.97 ± 0.15 µm per year. Multivariate mixed models showed that lower peripapillary PD (coefficient 0.04, P = .01) and VD (coefficient 0.09, P = .05) were significantly associated with a faster rate of GCIPL loss. Lower baseline peripapillary OMAG measurements were significantly associated with a faster rate of GCIPL loss in patients with mild to moderate POAG.