keyword
MENU ▼
Read by QxMD icon Read
search

Fovea

keyword
https://www.readbyqxmd.com/read/28092342/integrity-of-outer-retinal-layers-after-resolution-of-central-involved-diabetic-macular-edema
#1
Ilkay Kilic Muftuoglu, Nadia Mendoza, Raouf Gaber, Mostafa Alam, Qisheng You, William R Freeman
PURPOSE: To evaluate the integrity of outer retina layers after resolution of central involved diabetic macular edema (DME) and to demonstrate the effect of various baseline factors for the final vision and final external limiting membrane (ELM) integrity. METHODS: Fifty-nine eyes of 48 patients with resolved DME were included. Several optical coherence tomography parameters including central subfield thickness, maximum foveal thickness, foveal center point thickness, and the extent of the ellipsoidal (ISe) layer and ELM damage were assessed at the time of DME and after resolution of DME...
January 13, 2017: Retina
https://www.readbyqxmd.com/read/28090595/a-case-of-coats-disease-and-concurrent-anisometropic-amblyopia
#2
Nathan G Lambert, Robert O Hoffman, M Elizabeth Hartnett
PURPOSE: The aim of this report was to demonstrate a case of Coats disease in a patient with concurrent anisometropic amblyopia. OBSERVATIONS: A 10-year-old boy was diagnosed with Coats disease during routine ophthalmic examination. Visual acuity was 20/20 OD and 20/50 OS with cycloplegic refraction of +1.25 (OD) and +3.25 (OS). Examination under anesthesia showed macular exudates in the left eye that encroached near the fovea superotemporally. Despite the poor visual acuity and macular exudates, the foveal architecture of both eyes appeared normal on spectral domain optical coherence tomography...
December 2016: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/28089680/peripheral-retinal-changes-associated-with%C3%A2-age-related-macular-degeneration-in%C3%A2-the-age-related-eye-disease-study-2-age-related-eye-disease-study-2-report-number-12-by-the%C3%A2-age-related-eye-disease-study-2-optos-peripheral-retina-opera-study-research-group
#3
Amitha Domalpally, Traci E Clemons, Ronald P Danis, SriniVas R Sadda, Catherine A Cukras, Cynthia A Toth, Thomas R Friberg, Emily Y Chew
PURPOSE: To compare rates of peripheral retinal changes in Age-Related Eye Disease Study 2 (AREDS2) participants with at least intermediate age-related macular degeneration (AMD) with control subjects without intermediate age-related changes (large drusen). DESIGN: Cross-sectional evaluation of clinic-based patients enrolled in AREDS2 and a prospective study. PARTICIPANTS: Participants from prospective studies. METHODS: The 200° pseudocolor and fundus autofluorescence (FAF) images were captured on the Optos 200 Tx Ultrawide-field device (Optos, Dunfermline, Scotland) by centering on the fovea and then steering superiorly and inferiorly...
January 12, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28079755/macular-pigment-distribution-responses-to-high-dose-zeaxanthin-supplementation-in-patients-with-macular-telangiectasia-type-2
#4
Rene Y Choi, Aruna Gorusupudi, Kimberley Wegner, Mohsen Sharifzadeh, Werner Gellermann, Paul S Bernstein
PURPOSE: To analyze macular pigment (MP) amount and distribution in patients with macular telangiectasia Type 2 receiving oral zeaxanthin supplementation in a randomized, open-label, interventional trial. METHODS: Eight macular telangiectasia Type 2 patients were randomized to 10 mg or 20 mg of zeaxanthin per day. At each visit, best-corrected visual acuity, contrast sensitivity, fundus biomicroscopy, color fundus photography, autofluorescence imaging, optical coherence tomography, and serum carotenoid levels were tested...
January 10, 2017: Retina
https://www.readbyqxmd.com/read/28079613/centripetal-movement-of-the-capillaries-in-the-central-macular-region-after-internal-limiting-membrane-peeling
#5
Kazuyuki Kumagai, Masanori Hangai, Mariko Furukawa, Tetsuyuki Suetsugu, Nobuchika Ogino
PURPOSE: To report a case that showed centripetal movements of the capillaries in the central macular region after vitrectomy with internal limiting membrane peeling. METHODS: A 57-year-old pseudophakic woman underwent successful vitrectomy with internal limiting membrane peeling and air tamponade for a vitreomacular traction. Optical coherence tomography angiographic images of the 3 mm × 3 mm inner retinal vascular plexus were examined preoperatively and at 3 months postoperatively...
January 11, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28079062/does-retinal-configuration-make-the-head-and-eyes-of-foveate-birds-move
#6
Bret A Moore, Luke P Tyrrell, Diana Pita, Olaf R P Bininda-Emonds, Esteban Fernández-Juricic
Animals move their heads and eyes to compensate for movements of the body and background, search, fixate, and track objects visually. Avian saccadic head/eye movements have been shown to vary considerably between species. We tested the hypothesis that the configuration of the retina (i.e., changes in retinal ganglion cell density from the retinal periphery to the center of acute vision-fovea) would account for the inter-specific variation in avian head/eye movement behavior. We characterized retinal configuration, head movement rate, and degree of eye movement of 29 bird species with a single fovea, controlling for the effects of phylogenetic relatedness...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078975/the-uniformity-illusion
#7
Marte Otten, Yair Pinto, Chris L E Paffen, Anil K Seth, Ryota Kanai
Vision in the fovea, the center of the visual field, is much more accurate and detailed than vision in the periphery. This is not in line with the rich phenomenology of peripheral vision. Here, we investigated a visual illusion that shows that detailed peripheral visual experience is partially based on a reconstruction of reality. Participants fixated on the center of a visual display in which central stimuli differed from peripheral stimuli. Over time, participants perceived that the peripheral stimuli changed to match the central stimuli, so that the display seemed uniform...
January 2017: Psychological Science
https://www.readbyqxmd.com/read/28078170/computational-fluid-dynamics-assisted-characterization-of-parafoveal-hemodynamics-in-normal-and-diabetic-eyes-using-adaptive-optics-scanning-laser-ophthalmoscopy
#8
Yang Lu, Miguel O Bernabeu, Jan Lammer, Charles C Cai, Martin L Jones, Claudio A Franco, Lloyd Paul Aiello, Jennifer K Sun
Diabetic retinopathy (DR) is the leading cause of visual loss in working-age adults worldwide. Previous studies have found hemodynamic changes in the diabetic eyes, which precede clinically evident pathological alterations of the retinal microvasculature. There is a pressing need for new methods to allow greater understanding of these early hemodynamic changes that occur in DR. In this study, we propose a noninvasive method for the assessment of hemodynamics around the fovea (a region of the eye of paramount importance for vision)...
December 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/28077369/the-relationship-between-central-visual-field-sensitivity-and-macular-ganglion-cell-inner-plexiform-layer-thickness-in-glaucoma
#9
Ji-Woong Lee, Esteban Morales, Farideh Sharifipour, Navid Amini, Fei Yu, Abdelmonem A Afifi, Anne L Coleman, Joseph Caprioli, Kouros Nouri-Mahdavi
AIMS: To explore the correlation of local macular ganglion cell/inner plexiform layer (GC/IPL) thickness measurements with sensitivity at individual test locations on the central 10-2 visual fields (VFs) in patients with glaucoma. METHODS: One hundred thirty-seven eyes of 125 patients with spectral domain optical coherence tomography (OCT) and 10-2 VFs were included. The exported thickness matrices (200×200) of GC/IPL measurements were centred on the fovea. Total deviation values at each test location were correlated with the 20 000 GC/IPL thickness measurements in the corresponding inferior or superior hemiretina, and areas of highest correlation were plotted...
January 11, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28074469/development-of-cone-photoreceptors-and-their-synapses-in-the-human-and-monkey-fovea
#10
Anita Hendrickson, Chi Zhang
During retinal development, ribbon synapse assembly in the photoreceptors is a crucial step involving numerous molecules. While the developmental sequence of plexiform layers in human retina has been characterized, the molecular steps of synaptogenesis remain largely unknown. In the present study, we focused on the central rod-free region of primate retina, the fovea, to specifically investigate the development of cone photoreceptor ribbon synapses. Immunocytochemistry and electron microscopy were utilized to track the expression of photoreceptor transduction proteins and ribbon and synaptic markers in fetal human and Macaca retina...
January 11, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28070649/bipolar-cell-gap-junctions-serve-major-signaling-pathways-in-the-human-retina
#11
Orsolya Kántor, Alexandra Varga, Roland Nitschke, Angela Naumann, Anna Énzsöly, Ákos Lukáts, Arnold Szabó, János Németh, Béla Völgyi
Connexin36 (Cx36) constituent gap junctions (GJ) throughout the brain connect neurons into functional syncytia. In the retina they underlie the transmission, averaging and correlation of signals prior conveying visual information to the brain. This is the first study that describes retinal bipolar cell (BC) GJs in the human inner retina, whose function is enigmatic even in the examined animal models. Furthermore, a number of unique features (e.g. fovea, trichromacy, midget system) necessitate a reexamination of the animal model results in the human retina...
January 10, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28066738/ligamentum-teres-tendinopathy-and-tears
#12
REVIEW
Matthew J Kraeutler, Tigran Garabekyan, Cecilia Pascual-Garrido, Omer Mei-Dan
BACKGROUND: The ligamentum teres (LT) consists of two bands that originate on the ischial and pubic sides of the acetabular notch and insert on the fovea capitis of the femoral head. Recent studies have established the LT as an important hip stabilizer in a squatting position, particularly in patients with osseous instability. PURPOSE: This review aims to concisely present the literature on LT tendinopathy and tears in order to guide health care professionals in the appropriate diagnosis and treatment of these disorders...
July 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28062428/optical-coherence-tomography-angiography-and-fundus-autofluorescence-in-the-eyes-with-choroideremia
#13
Maki Kato, Ichiro Maruko, Hideki Koizumi, Tomohiro Iida
A 65-year-old man with presumed choroideremia with preserved central vision was examined by fundus autofluorescence (FAF) and optical coherence tomography angiography (OCTA). FAF showed an isolated area of hyperautofluorescence that involved the fovea. Although the choroid capillary slab of the OCTA showed the medium and large choroidal vessels inferior to the area of retinal pigment epithelium (RPE) atrophy, the choriocapillaris was visible in a relatively wider area than the hyperautofluorescent area in the FAF images...
January 6, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28057646/incidence-mechanism-and-outcomes-of-schisis-retinal-detachments-revealed-through-a-prospective-population-based-study
#14
Kanmin Xue, Mahiul M K Muqit, Eric Ezra, Stephen J Charles, David Yorston, Arijit Mitra, Chetan K Patel
AIM: To determine the incidence, presentation and outcomes of progressive sight-threatening retinal detachment (RD) complicating degenerative retinoschisis. METHODS: We conducted the first prospective population-based epidemiological study of progressive schisis detachment over a 1-year period (2014-2015) in the UK. Case ascertainment was via monthly British Ophthalmological Surveillance Unit reporting cards sent to all ophthalmologists in the UK. For each reported case, data were collected using incident and 6 months follow-up questionnaires gathering information including demographic, presenting symptoms, retinal findings, primary management, primary outcome, secondary management and secondary outcome...
January 5, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28057456/retina-and-choroid-of-diabetic-patients-without-observed-retinal-vascular-changes-a-longitudinal-study
#15
Joana Tavares Ferreira, Rita Proença, Marta Alves, Arnaldo Dias-Santos, Bruno Oliveira Santos, João Paulo Cunha, Ana Luísa Papoila, Luís Abegão Pinto
PURPOSE: To identify changes in choroidal thickness (CT) and all retinal layers of diabetic patients without diabetic retinopathy (DR) after one year of follow-up. DESIGN: Prospective observational cohort study. METHODS: Overall, 125 diabetic patients without DR were included. Two visits were scheduled: the first visit (V1) and a second visit after 12 months (V2). At both visits, patients received a complete ophthalmologic evaluation that included OCT...
January 2, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28057069/choroidal-thickness-findings-in-two-siblings-with-nanophthalmos-by-swept-source-oct-a-case-report
#16
Hiroyuki Kaneko, Ari Shinojima, Mori Ryusaburo, Akiyuki Kawamura, Mitsuko Yuzawa
BACKGROUND: We investigated choroidal thicknesses at five sites in two siblings (four eyes) with nanophthalmos using swept-source optical coherence tomography. CASE PRESENTATION: Case 1, a 51-year-old Japanese female with high hyperopia (Right: +20.5 Dioptors, Left: +19.5 Dioptors), had axial lengths of 15.6 mm in both eyes. Case 2, a 55-year-old Japanese male with high hyperopia (Right: +22.5 Dioptors, Left: +22.8 Dioptors), had axial lengths of 14.8 and 14.7 mm in the right and left eyes, respectively...
January 3, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28054161/the-relationship-of-nystagmus-waveform-on-the-vep-response-in-infantile-nystagmus-syndrome-a-small-case-series
#17
John P Kelly, James O Phillips, Avery H Weiss
PURPOSE: The relationship between eye movements and the visual evoked potential (VEP) response was examined in two subjects with infantile nystagmus syndrome (INS). Changes in VEP amplitude were compared between periods of foveation versus periods of high-frequency nystagmus. An analysis is proposed that improves extraction of the checkerboard reversal VEP signal from subjects with INS. METHODS: INS subjects were 2 healthy children (12-13 years old) with 20/40 or better corrected acuity...
January 5, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28052266/development-of-a-normative-database-for-multifocal-electroretinography-in-the-context-of-a-multicenter-clinical-trial
#18
Sílvia Simão, Miguel Ângelo Costa, Jennifer K Sun, José Cunha-Vaz, Rafael Simó
PURPOSE: The aim of this study is to present the largest normative database using multifocal electroretinography (mfERG) in the context of a multicenter clinical trial. METHODS: This investigational study included 156 eyes from 78 Caucasian subjects aged 45-70 years without known ophthalmic disease or diabetes mellitus; the subjects were recruited from 11 clinical sites in the setting of the EUROCONDOR project. Standardized mfERG acquisition (103 hexagons per eye) was established based on the International Society of Clinical Electrophysiology in Vision...
January 5, 2017: Ophthalmic Research
https://www.readbyqxmd.com/read/28048173/su-f-t-51-investigating-the-effect-of-eye-size-and-eccentricity-on-normal-tissue-doses-from-eye-plaque-brachytherapy
#19
E Polsdofer, R Crilly
PURPOSE: This study investigates the effect of eye size and eccentricity on doses to critical tissues by simulating doses in the Plaque Simulator (v. 6.3.1) software. Present OHSU plaque brachytherapy treatment focuses on delivering radiation to the tumor measured with ocular ultrasound plus a small margin and assumes the orbit has the dimensions of a "standard eye." Accurately modeling the dimensions of the orbit requires a high resolution ocular CT. This study quantifies how standard differences in equatorial diameters and eccentricity affect calculated doses to critical structures in order to query the justification of the additional CT scan to the treatment planning process...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046271/su-f-t-659-nanoparticle-aided-eye-plaque-radiotherapy
#20
J Chin, W Ngwa
PURPOSE: Eye plaque brachytherapy is one of the approaches for radiotherapy treatment for ocular cancers: retinoblastoma and choroidal melanoma. This study, investigates the potential benefits of using gold nanoparticles to enhance therapeutic efficacy during eye plaque brachytherapy. METHODS: The EYE PHYSICS Inc. Plaque Simulator program distributed by IsoAid, LLC, Port Richey, Florida was used. It is based on the superposition of dose contributions from individual seeds following the TG-43 formalism...
June 2016: Medical Physics
keyword
keyword
19445
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"