Results 21 to 30 of about 499,083 (318)

Quantitative analysis of retinal vasculature in normal eyes using ultra-widefield fluorescein angiography [PDF]

International Journal of Ophthalmology, 2021
AIM: To quantify the area and density of retinal vascularity by ultra-widefield fluorescein angiography (UWFA). METHODS: In a retrospective study, UWFA images were obtained using an ultra-widefield imaging device in 42 normal eyes of 42 patients. Central
Jing-Wen Jiang, Zuo-Hui-Zi Yi, Xiao-Ling Wang, Jue-Jun Liu, Gong-Peng Sun, Chang-Zheng Chen   +5 more
doaj   +1 more source

Retinal Prosthesis [PDF]

IEEE Transactions on Biomedical Engineering, 2012
Retinal prosthesis has been translated from the laboratory to the clinic over the past two decades. Currently, two devices have regulatory approval for the treatment of retinitis pigmentosa. These devices provide partial sight restoration and patients use this improved vision in their everyday lives.
James D. Weiland, Mark S. Humayun
openaire   +2 more sources

Analysis of retinal vessels in eyes with retinitis pigmentosa by retinal oximeter [PDF]

Acta Ophthalmologica, 2014
AbstractPurposeTo study changes in the oxygen saturation and calibre of retinal vessels in the eyes of patients with retinitis pigmentosa (RP).MethodIn this cross‐sectional study, 63 eyes of 63 patients with RP and 14 eyes of 14 healthy subjects were enrolled and examined at Toyama University Hospital. Retinal oximetry measurements were performed using
Tomoko, Ueda-Consolvo, Chiharu, Fuchizawa, Mitsuya, Otsuka, Takuya, Nakagawa, Atsushi, Hayashi   +4 more
openaire   +2 more sources

Retinal Hemodynamics in Retinitis Pigmentosa

American Journal of Ophthalmology, 1996
To investigate the retinal hemodynamic changes occurring in patients with retinitis pigmentosa (RP).Bidirectional laser Doppler velocimetry and monochromatic fundus photography were used to determine retinal venous diameter (D), maximum erythrocyte velocity (Vmax), and volumetric blood flow (Q) in the major retinal veins of eight patients with RP and ...
J E, Grunwald, A M, Maguire, J, Dupont
openaire   +2 more sources

ICL Postimplantation Decentration and Tilt in Myopic Patients with Primary Iridociliary Cysts

Journal of Ophthalmology, 2023
Purpose. To observe the decentration and tilt of implantable collamer lens (ICL) as well as possible visual effects postimplantation in primary iridociliary cysts. Methods. The present investigation was a retrospective cohort study.
Ying Wang, Ruibo Yang, Yue Huang, Chen Zhang, Hui Liu, Zhe Jia, Shaozhen Zhao   +6 more
doaj   +1 more source

Crystal Structure of the N112A Mutant of the Light-Driven Sodium Pump KR2

Crystals, 2020
The light-driven sodium pump KR2, found in 2013 in the marine bacteria Krokinobacter eikastus, serves as a model protein for the studies of the sodium-pumping microbial rhodopsins (NaRs). KR2 possesses a unique NDQ (N112, D116, and Q123) set of the amino
Nina Maliar, Kirill Kovalev, Christian Baeken, Taras Balandin, Roman Astashkin, Maksim Rulev, Alexey Alekseev, Nikolay Ilyinsky, Andrey Rogachev, Vladimir Chupin, Dmitry Dolgikh, Mikhail Kirpichnikov, Valentin Gordeliy   +12 more
doaj   +1 more source

Formation and enterohepatic circulation of metabolites ofc retinol and retinoic acid in bile duct-cannulated rats

Journal of Lipid Research, 1966
Four hours after intraportal injection of retinoic acid-14C into bile duct-cannulated rats, less than 10% of the radioactivity was recovered in the liver, intestine, and kidneys. Within 6 hr, 40% of the radioactivity had appeared in bile.
R.D. Zachman, P.E. Dunagin, Jr., J.A. Olson   +2 more
doaj   +1 more source

A Systematic Review and Meta-Analysis of Retinal Microvascular Features in Alzheimer's Disease

Frontiers in Aging Neuroscience, 2021
Objective: The aim of this meta-analysis was to investigate retinal microvascular features in patients with Alzheimer's disease (AD) using optical coherence tomography angiography (OCTA).Methods: PubMed, Cochrane Library, Embase, and Web of Science ...
Qifang Jin, Yiming Lei, Ruoxin Wang, Huiying Wu, Kaibao Ji, Ling Ling   +5 more
doaj   +1 more source

Interactive Blood Vessel Segmentation from Retinal Fundus Image Based on Canny Edge Detector

Sensors, 2021
Optometrists, ophthalmologists, orthoptists, and other trained medical professionals use fundus photography to monitor the progression of certain eye conditions or diseases. Segmentation of the vessel tree is an essential process of retinal analysis.
Alexander Ze Hwan Ooi, Zunaina Embong, Aini Ismafairus Abd Hamid, Rafidah Zainon, Shir Li Wang, Theam Foo Ng, Rostam Affendi Hamzah, Soo Siang Teoh, Haidi Ibrahim   +8 more
doaj   +1 more source

Noninvasive, In Vivo Assessment of Mouse Retinal Structure Using Optical Coherence Tomography [PDF]

, 2009
BACKGROUND: Optical coherence tomography (OCT) is a novel method of retinal in vivo imaging. In this study, we assessed the potential of OCT to yield histology-analogue sections in mouse models of retinal degeneration.
Gesine Huber, Huber, G., Muehlfriedel, Regine, Edda Fahl, Jan Wijnholds, Beck, SC, Remé Charlotte E., Tanimoto, Naoyuki, Tanimoto Naoyuki, Pacal, M, Van de Pavert, S.A., Fischer M. Dominik, Fischer, M.D., Pacal Marek, Christian Grimm, Muehlfriedel Regine, Wenzel, Andreas, Charlotte E Remé, Charlotte E. Remé, Pacal, Marek, Serge A van de Pavert, M. Dominik Fischer, Rod Bremner, Wenzel, A., Bremner Rod, Remé, Charlotte E, Fischer, M Dominik, Susanne C. Beck, Huber, Gesine, Wijnholds, J, Fahl, E, Beck, S.C., Marek Pacal, Grimm Christian, Wenzel, A, Regine Muehlfriedel, Huber Gesine, Wijnholds, Jan, Tanimoto, N, Bremner, R., Reme, C.E., Wijnholds, Jan; https://orcid.org/, Bremner, R, Seeliger Mathias W., Beck, Susanne C., Fischer, M. Dominik, Mathias W Seeliger, Wijnholds Jan, Bremner, Rod, van de Pavert Serge A., M Dominik Fischer, Andreas Wenzel, Mühlfriedel, Regine, Tanimoto, N., Fahl, E., Seeliger, Mathias W, Fischer, Manuel, Beck Susanne C., Seeliger, Mathias W., Remé, Charlotte E., Van De Pavert, SA, Fahl, Edda, Pacal, M., Remé, CE, van de Pavert, Serge A., Beck, Susanne C; https://orcid.org/, Huber, G, Grimm, C., Seeliger, MW, Wenzel Andreas, Fahl Edda, Mathias W. Seeliger, Pavert, S.A. van de, Grimm, C, Grimm, Christian, Grimm, Christian; https://orcid.org/, Muehlfriedel, R., Serge A. Van De Pavert¤b, Wijnholds, J., van de Pavert, Serge A, Susanne C Beck, Fischer, MD, Muehlfriedel, R, Seeliger, M.W., Naoyuki Tanimoto   +84 more
core   +1 more source