Results 21 to 30 of about 263,648 (295)

Retinal Vasculature Fractal Dimension Measures Vessel Density

Current Eye Research, 2015
The goal of this study was to provide the empirical evidence of fractal dimension as an indirect measure of retinal vasculature density.Two hundred retinal samples of right eye [57.0% females (n = 114) and 43.0% males (n = 86)] were selected from baseline visit. A custom-written software was used for vessel segmentation.
Ab Hamid, Fadilah, Che Azemin, Mohd Zulfaezal, Salam, Adzura, Aminuddin, Amilia, Mohd Daud, Norsyazwani, Zahari, Ilyanoon   +5 more
openaire   +4 more sources

Optical Coherence Tomography Angiography Vessel Density in Healthy, Glaucoma Suspect, and Glaucoma EyesOCT Angiography Vessel Density in Glaucoma [PDF]

, 2016
PurposeThe purpose of this study was to compare retinal nerve fiber layer (RNFL) thickness and optical coherence tomography angiography (OCT-A) retinal vasculature measurements in healthy, glaucoma suspect, and glaucoma patients.MethodsTwo hundred sixty-one eyes of 164 healthy, glaucoma suspect, and open-angle glaucoma (OAG) participants from the ...
Yarmohammadi, Adeleh, Zangwill, Linda M, Diniz-Filho, Alberto, Suh, Min Hee, Manalastas, Patricia Isabel, Fatehee, Naeem, Yousefi, Siamak, Belghith, Akram, Saunders, Luke J, Medeiros, Felipe A, Huang, David, Weinreb, Robert N   +11 more
openaire   +4 more sources

Diurnal Variation of Retinal Vessel Density in Healthy Human Eyes

Journal of Glaucoma, 2021
Precis: A small increase in optic nerve head vessel density (VD), but not macular VD, in the evening compared with the morning is observed in healthy subjects. Purpose: To evaluate the diurnal variation of the macular and optic nerve head (ONH) VD in healthy eyes as measured with ...
Wu, Jo-Hsuan, Penteado, Rafaella C, Moghimi, Sasan, Zangwill, Linda M, Proudfoot, James A, Weinreb, Robert N   +5 more
openaire   +5 more sources

Peripapillary Vessel Density In Unilateral Preperimetric Glaucoma

Clinical Ophthalmology, 2019
G Mangouritsas,1 N Koutropoulou,1 A Ragkousis,1 E Boutouri,1 A Diagourtas2 1Eye Clinic, General Hospital ‘‘Red Cross’’, Athens, Greece; 21st University Eye Clinic, General Hospital “G.
Mangouritsas G, Koutropoulou N, Ragkousis A, Boutouri E, Diagourtas A   +4 more
doaj   +4 more sources

Predicting the impact of retinal vessel density on retinal vessel and tissue oxygenation using a theoretical model

Mathematical Biosciences
Vascular impairments, including compromised flow regulation, have been identified as significant contributors to glaucomatous disease. Recent studies have shown glaucoma patients with significantly reduced peripapillary, macular, and optic nerve head vessel densities occurring with early glaucomatous structural changes prior to detectable visual field ...
Brendan C. Fry, Croix Gyurek, Amanda Albright, George Eckert, Janet Coleman-Belin, Alice Verticchio, Brent Siesky, Alon Harris, Julia Arciero   +8 more
openaire   +3 more sources

Macular vessel density in patients with refractory diabetic macular edema in different stages of nonproliferative diabetic retinopathy [PDF]

Journal of Research in Medical Sciences
Background: Macular vessel density can play a significant role in the prognosis of diabetic macular edema (DME). The aims of this study were to investigate macular vessel density using optical coherence tomography angiography (OCTA) in patients with ...
Ali Salehi, Mohammad Malekahmadi, Heshmatolah Ghanbari, Mahya Ghazi   +3 more
doaj   +2 more sources

Evaluation of macular and peripapillary vascular parameter change in healthy subjects after caffeine intake using optical coherence tomography angiography

Indian Journal of Ophthalmology, 2022
Purpose: To observe the effects of caffeine intake on vessel densities in macular and peripapillary regions and to analyze the correlations of vascular properties of these two interlinked regions in healthy volunteers using optical coherence tomography ...
Busra Yilmaz Tugan, Sevgi Subasi, Dilara Pirhan, Levent Karabas, Nursen Yuksel, Kubra Demirci Kucuk   +5 more
doaj   +1 more source

Peripapillary vessel density measurement of quadrant and clock-hour sectors in primary angle closure glaucoma using optical coherence tomography angiography

BMC Ophthalmology, 2021
Background The purpose of this study was to investigate diagnostic ability of peripapillary vessel density of primary angle closure glaucoma (PACG) eyes in quadrant and clock-hour sectors by optical coherence tomography angiography (OCTA).
Yongdong Lin, Shirong Chen, Mingzhi Zhang   +2 more
doaj   +1 more source

Associations between macular retinal vasculature and severity of idiopathic epiretinal membrane

BMC Ophthalmology, 2023
Background To demonstrate the associations between the morphology of macular retinal vasculature and disease severity of idiopathic epiretinal membrane (ERM).
Yun Hsia, Yi-Ting Hsieh
doaj   +1 more source

Compensatory contribution of retinal larger vessels to perfusion density in diabetics without retinopathy

Scientific Reports, 2022
Vessel and perfusion densities may decrease before diabetic retinopathy appears; it is unknown whether these changes affect the contribution of vessel density to perfusion density.
Dulce Milagros Razo Blanco-Hernández, Selma Alin Somilleda-Ventura, Rebeca Chávez-Herrera, María Guadalupe Colas-Calvere, Virgilio Lima-Gómez   +4 more
doaj   +1 more source