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https://www.readbyqxmd.com/read/29149766/numerosity-estimation-benefits-from-transsaccadic-information-integration
#1
Carolin Hübner, Alexander C Schütz
Humans achieve a stable and homogeneous representation of their visual environment, although visual processing varies across the visual field. Here we investigated the circumstances under which peripheral and foveal information is integrated for numerosity estimation across saccades. We asked our participants to judge the number of black and white dots on a screen. Information was presented either in the periphery before a saccade, in the fovea after a saccade, or in both areas consecutively to measure transsaccadic integration...
November 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/29149238/diabetic-neuroglial-changes-in-the-superficial-and-deep-nonperfused-areas-on-optical-coherence-tomography-angiography
#2
Yoko Dodo, Tomoaki Murakami, Kiyoshi Suzuma, Shin Yoshitake, Tatsuya Yoshitake, Kenji Ishihara, Masahiro Fujimoto, Yuko Miwa, Akitaka Tsujikawa
Purpose: To evaluate the relationship between lamellar capillary nonperfusion on optical coherence tomography angiography (OCTA) images and neuroglial changes on structural optical coherence tomography (OCT) images in diabetic retinopathy (DR). Methods: We retrospectively reviewed 101 consecutive eyes of 69 patients with DR. OCTA and OCT images within a 3 × 3-mm square centered on the fovea were acquired simultaneously. The nonperfused areas (NPAs) in the superficial capillary layer (sNPA) (from the nerve fiber layer [NFL] to the inner plexiform layer [IPL]), the deep layer (dNPA) (corresponding mainly to the inner nuclear layer [INL]), or both layers (bNPA) were measured individually along 10 transverse lines...
November 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29141085/the-contribution-of-foveal-and-peripheral-visual-information-to-ensemble-representation-of-face-race
#3
Wonmo Jung, Isabelle Bülthoff, Regine G M Armann
The brain can only attend to a fraction of all the information that is entering the visual system at any given moment. One way of overcoming the so-called bottleneck of selective attention (e.g., J. M. Wolfe, Võ, Evans, & Greene, 2011) is to make use of redundant visual information and extract summarized statistical information of the whole visual scene. Such ensemble representation occurs for low-level features of textures or simple objects, but it has also been reported for complex high-level properties...
November 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/29138543/location-of-submacular-hemorrhage-as-a-predictor-of-visual-outcome-after-intravitreal-ranibizumab-for-age-related-macular-degeneration
#4
Dimitrios Karagiannis, Irini Chatziralli, Konstantinos Kaprinis, Ilias Georgalas, Efstratios Parikakis, Panagiotis Mitropoulos
Purpose: To evaluate the anatomical and functional outcomes in patients with submacular hemorrhage (SMH) due to age-related macular degeneration (AMD) treated with ranibizumab, and to evaluate the potential role of the SMH location in the final outcome after treatment. Methods: Participants in this study were 12 treatment-naïve patients with SMH due to neovascular AMD who were treated with intravitreal ranibizumab and had at least 12 months' follow-up. All patients underwent best-corrected visual acuity measurement and optical coherence tomography at baseline and at every visit posttreatment, while fluorescein angiography was done at baseline and at the discretion of the physician thereafter...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/29135798/vitrectomy-with-subretinal-tissue-plasminogen-activator-and-gas-tamponade-for-subfoveal-hemorrhage-prognostic-factors-and-clinical-outcomes
#5
David J A Plemel, Steven R J Lapere, Christopher J Rudnisky, Matthew T S Tennant
PURPOSE: To study the prognostic factors and clinical outcomes of patients who underwent pars plana vitrectomy, subretinal injection of tissue plasminogen activator, and gas tamponade for the treatment of subfoveal hemorrhage (SFH). METHODS: A retrospective noncomparative interventional case series. RESULTS: Seventy-eight eyes from 77 patients were included. A total of 84.6% of eyes developed SFH from age-related macular degeneration. Partial or complete displacement of the SFH was achieved in 91...
November 10, 2017: Retina
https://www.readbyqxmd.com/read/29131902/choroidal-thickness-in-and-outside-of-vascular-arcade-in-healthy-eyes-using-spectral-domain-optical-coherence-tomography
#6
Jae Yong Park, Bum Gi Kim, Je Hyung Hwang, Jae Suk Kim
Purpose: To study the distribution of choroidal thickness (CT) in and outside of the vascular arcade, as well as at the fovea in healthy eyes using spectral-domain optical coherence tomography (OCT). Methods: Seventy healthy eyes were examined with OCT to obtain nine horizontal lines in and outside of the vascular arcade. Nine points including the central point of the line were chosen in 0.5-mm intervals to calculate CT. CT was measured at a total of 81 points in each patient to construct a map of CT distribution...
November 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29131474/photodynamic-therapy-with-double-duration-for-circumscribed-choroidal-haemangioma-functional-and-anatomical-results-based-on-initial-parameters
#7
Daniela Süsskind, Werner Inhoffen, Faik Gelisken, Michael Völker
IMPORTANCE: Pretreatment symptoms longer than twelve months and foveal cystoid changes are indicators for poor anatomical and functional outcome after photodynamic therapy. BACKGROUND: To evaluate the prognostic factors on the effectiveness of photodynamic therapy with double duration for treatment of exudative circumscribed choroidal haemangioma DESIGN: Retrospective study. PARTICIPANTS: Twenty-seven patients with symptomatic exudative circumscribed choroidal haemangioma treated with photodynamic therapy...
November 13, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/29126757/quantifying-the-rate-of-ellipsoid-zone-loss-in-stargardt-disease
#8
Cindy X Cai, Jacob G Light, James T Handa
PURPOSE: To determine a reliable method of using the ellipsoid zone (EZ) on optical coherence tomography (OCT) to track disease progression in Stardgardt disease (STGD). DESIGN: retrospective reliability study METHODS: STGD patients with genetically confirmed ABCA4 gene mutations seen at the Wilmer Eye Institute with follow-up visits separated by at least 12 months were identified. Spectral domain optical coherence tomography (SD-OCT) macula volume scans centered at the fovea and fundus autofluorescence (FAF) images were obtained...
November 7, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29121360/quantitative-choriocapillaris-perfusion-before-and-after-vitrectomy-in-idiopathic-epiretinal-membrane-by-optical-coherence-tomography-angiography
#9
Yanping Yu, Yufei Teng, Meng Gao, Xinxin Liu, Jinqiu Chen, Wu Liu
BACKGROUND AND OBJECTIVES: To compare choriocapillaris perfusion of the fovea between patients with idiopathic epiretinal membrane (iERM) and normal controls and determine whether surgery affects it. PATIENTS AND METHODS: Both eyes of 45 patients with iERM and 28 healthy subjects were scanned by optical coherence tomography angiography (OCTA) preoperatively, and 25 of the patients were scanned postoperatively. Central parameters measured included flow area and parafovea vessel density of the foveal choriocapillaris...
November 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/29118510/foveal-neovascularization-in-a-patient-with-type-2-diabetes-mellitus
#10
Anisha Seth, Basudeb Ghosh, Vishaal Bhambhwani, Anika Gupta, Usha K Raina
Retinal neovascularization in Diabetes mellitus (DM) is commonly seen at the optic disc and mid-periphery. It is rare at the fovea as the fovea is an avascular zone and there are very few case reports of foveal neovascularization in Type 1 DM. We report a case of unilateral foveal neovascularization in Type 2 DM.
September 2017: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/29116450/response-properties-of-pulvinar-neurons-studied-with-single-unit-electrophysiological-recordings
#11
Ricardo Gattass, Juliana G M Soares, Bruss Lima
In this chapter, we discuss the types of visual receptive fields revealed by single-unit electrophysiological recordings in the pulvinar. Nearly all neurons with identifiable receptive fields responded to visual stimulation presented on the contralateral hemifield, within 25° of the fovea. The majority of the visual neurons responded to some form of moving stimulus, and some additionally exhibited direction or orientation selectivity. Most units could be driven by monocular stimulation and showed receptive fields of at least 100 square degrees in area...
2018: Advances in Anatomy, Embryology, and Cell Biology
https://www.readbyqxmd.com/read/29114838/optical-coherence-tomography-angiography-macular-and-peripapillary-vessel-perfusion-density-in-healthy-subjects-glaucoma-suspects-and-glaucoma-patients
#12
COMPARATIVE STUDY
Giacinto Triolo, Alessandro Rabiolo, Nathan D Shemonski, Ali Fard, Federico Di Matteo, Riccardo Sacconi, Paolo Bettin, Stephanie Magazzeni, Giuseppe Querques, Luis E Vazquez, Piero Barboni, Francesco Bandello
Purpose: To evaluate macular and peripapillary vessel perfusion density (VD) in glaucoma suspects (GS) and glaucoma patients; to correlate ganglion cell-inner plexiform layer (GCIPL) and retinal nerve fiber layer (RNFL) thicknesses with macular and peripapillary VD; and to evaluate the diagnostic accuracy of the structural and vascular parameters. Methods: A consecutive series of GS, glaucoma patients, and healthy subjects was prospectively recruited from July 1, 2016, to January 31, 2017...
November 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29110945/the-progression-of-geographic-atrophy-secondary-to-age-related-macular-degeneration
#13
REVIEW
Monika Fleckenstein, Paul Mitchell, K Bailey Freund, SriniVas Sadda, Frank G Holz, Christopher Brittain, Erin C Henry, Daniela Ferrara
Geographic atrophy (GA) is an advanced form of age-related macular degeneration (AMD) that leads to progressive and irreversible loss of visual function. Geographic atrophy is defined by the presence of sharply demarcated atrophic lesions of the outer retina, resulting from loss of photoreceptors, retinal pigment epithelium (RPE), and underlying choriocapillaris. These lesions typically appear first in the perifoveal macula, initially sparing the foveal center, and over time often expand and coalesce to include the fovea...
October 27, 2017: Ophthalmology
https://www.readbyqxmd.com/read/29110126/-lamellar-macular-holes-with-hyporeflective-epiretinal-proliferation-oct-diagnostics-and-clinical-course
#14
REVIEW
D Vogt, F Bottoni, S G Priglinger, R G Schumann
BACKGROUND: High-resolution spectral domain optical coherence tomography (SD-OCT) is the standard examination for assessment of lamellar macular holes (LMH). According to the current SD-OCT classification of LMHs, they are characterized by (1) an irregular foveal contour, (2) a defect in the inner fovea, and (3) a separation of inner retinal layers from outer retinal layers of the fovea leading to an intraretinal splitting with loss of retinal tissue. OBJECTIVE: The article aims to give an overview on the current knowledge of retinal imaging in LMH diagnostics and clinical course of disease...
November 6, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/29109903/the-diagnostic-role-of-multimodal-imaging-techniques-in-isolated-foveal-hypoplasia
#15
Figen Batıoğlu, Sibel Demirel, Emin Özmert, Betül Bayraktutar, Özge Yanık
To report a case of bilateral isolated foveal hypoplasia in which multimodal imaging was used to confirm the diagnosis. Fundus autofluorescence imaging, optical coherence tomography (OCT), and fundus fluorescein angiography were used to describe the typical findings of a patient with isolated foveal hypoplasia. Spectral domain OCT showed absence of foveal depression and persistent inner retinal layers in the fovea. Fundus autofluorescence did not reveal foveal hypoautofluorescence in the presumed foveal area...
October 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/29108397/internal-retinal-layer-thickness-and-macular-migration-after-internal-limiting-membrane-peeling-in-macular-hole-surgery
#16
Mun Y Faria, Nuno P Ferreira, Sofia Mano, Diana M Cristóvao, David C Sousa, Manuel E Monteiro-Grillo
PURPOSE: To provide a spectral-domain optical coherence tomography (SD-OCT)-based analysis of retinal layers thickness and nasal displacement of closed macular hole after internal limiting membrane peeling in macular hole surgery. METHODS: In this nonrandomized prospective interventional study, 36 eyes of 32 patients were subjected to pars plana vitrectomy and 3.5 mm diameter internal limiting membrane (ILM) peeling for idiopathic macular hole (IMH). Nasal and temporal internal retinal layer thickness were assessed with SD-OCT...
October 16, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29106913/tractional-abnormalities-of-the-central-foveal-bouquet-in-epiretinal-membranes-clinical-spectrum-and-pathophysiological-perspectives
#17
Andrea Govetto, Kavita V Bhavsar, Gianni Virgili, Matthew J Gerber, K Bailey Freund, Christine A Curcio, Claude F Burgoyne, Jean-Pierre Hubschman, David Sarraf
PURPOSE: To investigate the tractional alterations of the central bouquet (CB) in idiopathic epiretinal membranes (ERMs). DESIGN: Retrospective, consecutive, observational case series. METHODS: ERMs were classified according to a 4-stage grading system. The CB was defined as a circular area of approximately 100 μm composed of densely packed cones (and Müller cells) in the central fovea. Tractional abnormalities of the CB were identified with spectral-domain optical coherence tomography...
October 26, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29105362/monitoring-foveal-sparing-in-geographic-atrophy-with-fluorescence-lifetime-imaging-ophthalmoscopy-a-novel-approach
#18
Lydia Sauer, Matthias Klemm, Sven Peters, Dietrich Schweitzer, Johanna Schmidt, Lukas Kreilkamp, Lisa Ramm, Daniel Meller, Martin Hammer
PURPOSE: To investigate fundus autofluorescence (FAF) lifetimes in geographic atrophy (GA) with a focus on macular pigment (MP) and foveal sparing. METHODS: The study included 35 eyes from 28 patients (mean age 79.2 ± 8.0 years) with GA. A 30° retinal field, centred at the macula, was investigated using fluorescence lifetime imaging ophthalmoscopy (FLIO). The FLIO technology is based on a Heidelberg Engineering Spectralis system. Decays of FAF were detected in a short (498-560 nm, SSC) and long (560-720 nm, LSC) spectral channel...
November 4, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29105095/minimally-invasive-technique-for-coxofemoral-luxation-stabilisation-using-transarticular-toggle-system-a-cadaveric-study
#19
U Segal, J Shani, R Joseph
OBJECTIVE: To present a novel, semi-closed, surgical technique for coxofemoral luxation stabilisation using a transarticular toggle rod. STUDY DESIGN: Cadaveric study. MATERIALS AND METHODS: Craniodorsal luxation was generated by transecting the ligamentum teres in 12 coxofemoral joints and was then reduced using a closed technique. Anteversion and inclination angles were measured using fluoroscopic projections. An arthroscope was inserted through a bone tunnel drilled from the third trochanter through the femoral neck...
November 3, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/29103961/high-resolution-imaging-in-male-germ-cell-associated-kinase-mak-related-retinal-degeneration
#20
Young Ju Lew, Nicholas Rinella, Jia Qin, Joanna Chiang, Anthony T Moore, Travis C Porco, Austin Roorda, Jacque L Duncan
PURPOSE: To describe the characteristics of MAK-related retinal degeneration using optical coherence tomography angiography (OCTA) and adaptive optics scanning laser ophthalmoscopy (AOSLO). DESIGN: Cross-sectional study. METHODS: Six patients with rod-cone degeneration and disease-causing mutations in MAK were evaluated with visual acuity, spectral domain OCT, confocal AOSLO and OCTA. Foveal avascular zone (FAZ) area, vessel densities and perfusion densities of the superficial capillary plexus (SCP) and deep capillary plexus (DCP) in the central macula in all 6 patients were compared with 5 normal subjects...
November 2, 2017: American Journal of Ophthalmology
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