Araştırma Çıktıları

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Author: search.filters.author.Celebi, Ali Riza CenkSubject: search.filters.subject.glaucoma

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    Structure-Function Mapping Using a Three-Dimensional Neuroretinal Rim Parameter Derived From Spectral Domain Optical Coherence Tomography Volume Scans
    (ASSOC RESEARCH VISION OPHTHALMOLOGY INC, 2021-01-01) Celebi, Ali Riza Cenk; Park, Elli A.; Vercellin, Alice Chandra Verticchio; Tsikata, Edem; Lee, Ramon; Shieh, Eric; Antar, Hussein; Freeman, Madeline; Zhang, Jing; Que, Christian; Simavli, Huseyin; McClurkin, Michael; Guo, Rong; Elze, Tobias; de Boer, Johannes F.; Chen, Teresa C.
    Purpose: To assess the structure-function relationship in glaucoma using Humphrey visual field (HVF) perinnetry and a three-dimensional neuroretinal rim parameter derived from spectral domain optical coherence tomography (SD-OCT) volume scans. Methods: Structure-function correlation was analyzed globally and regionally (four quadrants and four sectors). Structural data included peripapillary retinal nerve fiber layer (RNFL) thickness and minimum distance band (MDB) neuroretinal rim thickness, defined as the shortest distance between the inner cup surface and the outer retinal pigment epithelium/Bruch's membrane complex. Logarithmic regression analyses were performed and Pearson correlation coefficients determined to assess relationship strength. Results: The study consisted of 102 open-angle glaucoma patients and 58 healthy subjects. The Pearson correlation coefficient for global MDB thickness (R = 0.585) was higher than for global RNFL thickness (R = 0.492), but the difference was not statistically significant (P = 0.18). The correlation coefficients for regional MDB thicknesses and corresponding HVF sensitivities were higher than those for regional RNFL thicknesses and HVF in six out of eight regions (P = 0.08 to 0.47). In the remaining two out of eight regions, the correlation coefficients were higher for RNFL thickness than for MDB thickness (P = 0.15 to 0.20). Conclusions: Three-dimensional MDB neuroretinal rim thickness relates to visual function as strongly as the most commonly used SD-OCT parameter for glaucoma, two-dimensional peripapillary RNFL thickness. Translational Relevance: This paper illustrates the potential for 3D OCT algorithms to improve in vivo imaging in glaucoma.
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    The effect of hemodialysis on intraocular pressure
    (WROCLAW MEDICAL UNIV, 2018-01-01) Kilavuzoglu, Ayse Ebru Bahadir; Yurteri, Gurkan; Guven, Nurgul; Marsap, Savas; Celebi, Ali Riza Cenk; Cosar, Cemile Banu
    Background. The effect of hemodialysis (HD) on intraocular pressure (IOP) has been investigated before, but there is a lack of consensus. Clinicians dealing with renal failure patients are interested in the potential negative effects of HD on IOP and the course of glaucoma. Objectives. The aim of this study was to investigate the effects of HD on IOP in patients with end-stage renal disease. Material and methods. This prospective study included 106 patients who were receiving outpatient hemodialysis. Patient history of systemic and ophthalmologic conditions was recorded. Serum osmolality (mOsm), blood urea nitrogen (BUN), blood glucose (BG), bicarbonate (BC), and hematocrit (Hct) levels at the start of HD (pre-HD), at the end of HD (end-HD), and 30 min after HD (post-HD) were measured. Systolic and diastolic blood pressures (SBP and DBP) and IOP were measured at pre-HD, 1-hour intervals during HD, end-HD, and post-HD. Results. A significant decrease in mOsm and BUN and a significant increase in BG, BC, and Hct levels were observed at end-HD (p < 0.05). Mean IOP was 16.71 +/- 2.51 mm Hg at pre-HD, 15.52 +/- 3.18 mm Hg at end-HD, and 15.23 +/- 2.73 mm Hg at post-HD (p = 0.001