{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:38:35Z","timestamp":1760146715866,"version":"build-2065373602"},"reference-count":93,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2024,12,3]],"date-time":"2024-12-03T00:00:00Z","timestamp":1733184000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Medical University of Bialystok","award":["B.SUB.24.248"],"award-info":[{"award-number":["B.SUB.24.248"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background\/Objectives: Glaucomatous neuropathy, a progressive deterioration of retinal ganglion cells, is the leading cause of irreversible blindness worldwide. While elevated intraocular pressure (IOP) is a well-established modifiable risk factor, increasing attention is being directed towards IOP-independent factors, such as vascular alterations. Color Doppler imaging (CDI) is a prominent technique for investigating blood flow parameters in extraocular vessels. This prospective, nonrandomized clinical trial aimed to assess the impact of ab externo canaloplasty on ocular blood flow parameters in patients with primary open-angle glaucoma (POAG) at a three-month follow-up. Methods: Twenty-five eyes of twenty-five patients with early or moderate POAG underwent canaloplasty with simultaneous cataract removal. CDI was used to measure peak systolic velocity (PSV), end-diastolic velocity (EDV), and resistive index (RI) in the ophthalmic artery (OA), central retinal artery (CRA), and short posterior ciliary arteries (SPCAs) before and after surgery. Results: The results showed a significant reduction in IOP and improvement in mean deviation at three months post-surgery. Best corrected visual acuity and retinal nerve fiber layer thickness significantly increased at each postoperative control visit. However, no significant changes were observed in PSV, EDV, and RI in the studied vessels. Conclusions: In conclusion, while canaloplasty effectively reduced IOP and medication burden, it did not significantly improve blood flow parameters in vessels supplying the optic nerve at three months post-surgery. Careful patient selection considering glaucoma severity and vascular risk factors is crucial when choosing between canaloplasty and more invasive procedures like trabeculectomy. Further larger studies are needed to comprehensively analyze this issue.<\/jats:p>","DOI":"10.3390\/jcm13237373","type":"journal-article","created":{"date-parts":[[2024,12,3]],"date-time":"2024-12-03T11:48:56Z","timestamp":1733226536000},"page":"7373","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Color Doppler Imaging Assessment of Ocular Blood Flow Following Ab Externo Canaloplasty in Primary Open-Angle Glaucoma"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0046-1400","authenticated-orcid":false,"given":"Mateusz","family":"Zarzecki","sequence":"first","affiliation":[{"name":"Department of Ophthalmology, Medical University of Bialystok, 15-089 Bialystok, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jakub","family":"B\u0142a\u017cowski","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Medical University of Bialystok, 15-089 Bialystok, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Iwona","family":"Obuchowska","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Medical University of Bialystok, 15-089 Bialystok, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrzej","family":"Ustymowicz","sequence":"additional","affiliation":[{"name":"Department of Radiology, Medical University of Bialystok, 15-089 Bialystok, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pawe\u0142","family":"Kra\u015bnicki","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Medical University of Bialystok, 15-089 Bialystok, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9088-6938","authenticated-orcid":false,"given":"Joanna","family":"Konopi\u0144ska","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology, Medical University of Bialystok, 15-089 Bialystok, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,12,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1788","DOI":"10.1016\/S0140-6736(23)01289-8","article-title":"Glaucoma: Now and beyond","volume":"402","author":"Jayaram","year":"2023","journal-title":"Lancet"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Hohberger, B., Lucio, M., Schlick, S., Wollborn, A., Hosari, S., and Mardin, C. 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