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https://www.readbyqxmd.com/read/27904024/cartilage-attachment-morphology-of-the-fetal-cruciate-ligaments-of-the-knee-an-immunohistochemical-study-using-human-fetal-specimens
#1
Masahito Yamamoto, Hiromasa Takada, Takeshi Takayama, Sakura Katsumura, Mayumi Sato, Hiroshi Abe, Gen Murakami, Shin-Ichi Abe
Fetal cruciate ligaments of the knee provide two types of cartilage attachments: to a cartilage fovea or a simple continuation to the perichondrium. To examine a difference in matrix substance between a ligament attachment to the fovea and another attachment to the perichondrium. We histologically observed 12 human fetal femurs in which the posterior (or anterior) cruciate ligament provided a fovea-type (or a perichondrium-type) attachment. Immunohistochemistry of matric substances (aggrecan, versican, tenascin-c) was performed...
2016: Okajimas Folia Anatomica Japonica
https://www.readbyqxmd.com/read/27898029/data-driven-multiresolution-camera-using-the-foveal-adaptive-pyramid
#2
Martin González, Antonio Sánchez-Pedraza, Rebeca Marfil, Juan A Rodríguez, Antonio Bandera
There exist image processing applications, such as tracking or pattern recognition, that are not necessarily precise enough to maintain the same resolution across the whole image sensor. In fact, they must only keep it as high as possible in a relatively small region, but covering a wide field of view. This is the aim of foveal vision systems. Briefly, they propose to sense a large field of view at a spatially-variant resolution: one relatively small region, the fovea, is mapped at a high resolution, while the rest of the image is captured at a lower resolution...
November 26, 2016: Sensors
https://www.readbyqxmd.com/read/27895998/quantifying-intraocular-scatter-with-near-diffraction-limited-double-pass-point-spread-function
#3
Junlei Zhao, Fei Xiao, Jian Kang, Haoxin Zhao, Yun Dai, Yudong Zhang
Measurement of the double-pass (DP) point-spread function (PSF) can provide an objective and non-invasive method for estimating intraocular scatter in the human eye. The objective scatter index (OSI), which is calculated from the DP PSF images, is commonly used to quantify intraocular scatter. In this article, we simulated the effect of higher-order ocular aberrations on OSI, and the results showed that higher-order ocular aberrations had a significant influence on OSI. Then we developed an adaptive optics DP PSF measurement system (AO-DPPMS) which was capable of correcting ocular aberrations up to eighth-order radial Zernike modes over a 6...
November 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27867756/reference-clinical-database-for-fixation-stability-metrics-in-normal-subjects-measured-with-the-maia-microperimeter
#4
Marco U Morales, Saker Saker, Craig Wilde, Carlo Pellizzari, Aristophanes Pallikaris, Neil Notaroberto, Martin Rubinstein, Chiara Rui, Paolo Limoli, Michael K Smolek, Winfried M Amoaku
PURPOSE: The purpose of this study was to establish a normal reference database for fixation stability measured with the bivariate contour ellipse area (BCEA) in the Macular Integrity Assessment (MAIA) microperimeter. METHODS: Subjects were 358 healthy volunteers who had the MAIA examination. Fixation stability was assessed using two BCEA fixation indices (63% and 95% proportional values) and the percentage of fixation points within 1° and 2° from the fovea (P1 and P2)...
November 2016: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/27867714/automatic-identification-of-the-temporal-retinal-nerve-fiber-raphe-from-macular-cube-data
#5
Phillip Bedggood, Fumi Tanabe, Allison M McKendrick, Andrew Turpin
We evaluated several approaches for automatic location of the temporal nerve fiber raphe from standard macular cubes acquired on a Heidelberg Spectralis OCT. Macular cubes with B-scan separation of 96-122 µm were acquired from 15 healthy participants, and "high density" cubes with scan separation of 11 µm were acquired from the same eyes. These latter scans were assigned to experienced graders for subjective location of the raphe, providing the ground truth by which to compare methods operating on the lower density data...
October 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27867659/ganglion-cell-inner-plexiform-layer-peripapillary-retinal-nerve-fiber-layer-and-macular-thickness-in-eyes-with-myopic-%C3%AE-zone-parapapillary-atrophy
#6
Jin-Woo Kwon, Jin A Choi, Jung-Sub Kim, Tae Yoon La
Purpose. To assess the correlations of myopic β-zone parapapillary atrophy (β-PPA) with the optic nerve head (ONH) and retina. Methods. We selected 27 myopic patients who showed prominent β-PPA in one eye and no β-PPA in the other eye. We studied their macula, macular ganglion cell-inner plexiform layer (mGCIPL), peripapillary retinal nerve fiber layer (pRNFL) thickness, and ONH parameters using optical coherence tomography. Results. The average of five out of six sectors and minimum values of mGCIPL thicknesses in eyes with prominent β-PPA discs were significantly less than those of the control eyes...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/27864836/choroidal-and-central-foveal-thickness-in-patients-with-scleroderma-and-its-systemic-associations
#7
Erdinc Aydin, Sevinc Atik, Feray Koc, Melike Balikoglu-Yilmaz, Sirin Akin Sari, Mustafa Ozmen, Servet Akar
BACKGROUND: The aim was to investigate the morphological changes in the fovea and choroid in patients with scleroderma and its systemic associations. METHODS: Thirty-four scleroderma patients and 31 healthy controls were enrolled. Choroidal thickness (CT) at five defined points (subfoveal [sfCT] and 1.0 [N1.0] and 3.0 µm nasal [N3.0] and 1.0 [T1.0] and 3.0 µm temporal [T3.0] from the centre of the fovea) and central foveal thickness were measured. RESULTS: The mean central foveal thickness (right eye 229...
November 18, 2016: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/27861391/effect-of-age-and-sex-on-retinal-layer-thickness-and-volume-in-normal-eyes
#8
Jae Yon Won, Sung Eun Kim, Young-Hoon Park
The aim of the study was to evaluate the effect of sex and age on the thickness of the retinal layer in normal eyes using spectral-domain optical coherence tomography (SD-OCT).Fifty healthy subjects between the ages of 20 and 80 had their retinal layers measured using SD-OCT at Seoul St. Mary's Hospital. Mean thickness and volume were measured for 9 retinal layers in the fovea, the pericentral ring, and the peripheral ring. The differences of sex- and age-related thickness and volume in each retinal layer were analyzed...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27853955/different-foveal-schisis-patterns-in-each-retinal-layer-in-eyes-with-hereditary-juvenile-retinoschisis-evaluated-by-en-face-optical-coherence-tomography
#9
Tomoyo Yoshida-Uemura, Satoshi Katagiri, Tadashi Yokoi, Sachiko Nishina, Noriyuki Azuma
PURPOSE: To analyze the structures of schisis in eyes with hereditary juvenile retinoschisis using en-face optical coherence tomography (OCT) imaging. METHODS: In this retrospective observational study, we reviewed the medical records of patients with hereditary juvenile retinoschisis who underwent comprehensive ophthalmic examinations including swept-source OCT. RESULTS: OCT images were obtained from 16 eyes of nine boys (mean age ± standard deviation, 10...
November 16, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27849311/choroidal-thickness-and-choroidal-vessel-density-in-nonexudative-age-related-macular-degeneration-using-swept-source-optical-coherence-tomography-imaging
#10
Fang Zheng, Giovanni Gregori, Karen B Schaal, Andrew D Legarreta, Andrew R Miller, Luiz Roisman, William J Feuer, Philip J Rosenfeld
Purpose: To analyze the relationship between choroidal thickness and the distribution of choroidal blood vessels in eyes with nonexudative AMD. Methods: Eyes with a diagnosis of nonexudative AMD were imaged using a prototype 100-kHz swept-source (SS) optical coherence tomography (OCT) instrument (Carl Zeiss Meditec, Dublin, CA, USA) with a central wavelength of 1050 nm. We used an OCT cube scan pattern consisting of 512 × 512 A-scans over a 12 × 12 mm retinal area...
November 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27847640/choroidal-thickness-in-older-patients-with-central-serous-chorioretinopathy
#11
Caio V Regatieri, Eduardo A Novais, Lauren Branchini, Mehreen Adhi, Emily D Cole, Ricardo Louzada, Mark Lane, Elias Reichel, Jay S Duker
BACKGROUND: To investigate the choroidal thickness in older patients with central serous chorioretinopathy (CSCR) compared to age-matched normal subjects. METHODS: Fifteen patients (30 eyes) with CSCR, all aged ≥60 years, and 21 age-matched normal subjects (21 eyes) underwent high-definition raster scanning using SD-OCT. Both eyes from CSCR patients were included in the analysis. The eyes in patients with CSCR were divided into two groups: active CSCR (17 eyes) if there was foveal-involving subretinal fluid and inactive contralateral eye group (13 eyes)...
2016: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/27847632/changes-of-macular-pigment-optical-density-in-elderly-eyes-a-longitudinal-analysis-from-the-mars-study
#12
Verena Meyer Zu Westrup, Martha Dietzel, Meike Zeimer, Daniel Pauleikhoff, Hans-Werner Hense
BACKGROUND: Macular pigment (MP) has been related to the occurrence of age related macular degeneration (AMD). We investigated prospectively in eyes of elderly individuals how magnitude and spatial distribution of MP had changed after 4 years. METHODS: The study included 380 eyes from 237 participants of the Münster Ageing and Retina Study cohort which were free of advanced stages of AMD. MP optical density (MPOD) was measured in density units (D.U.) at eccentricities of 0...
2016: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/27846063/comparison-of-cysts-in-red-and-green-images-for-diabetic-macular-edema
#13
Mastour A Alhamami, Ann E Elsner, Victor E Malinovsky, Christopher A Clark, Bryan P Haggerty, Glen Y Ozawa, Jorge A Cuadros, Karthikeyan Baskaran, Thomas J Gast, Taras V Litvin, Matthew S Muller, Shane G Brahm, Stuart B Young, Masahiro Miura
PURPOSE: To investigate whether cysts in diabetic macular edema are better visualized in the red channel of color fundus camera images, as compared with the green channel, because color fundus camera screening methods that emphasize short-wavelength light may miss cysts in patients with dark fundi or changes to outer blood retinal barrier. METHODS: Fundus images for diabetic retinopathy photoscreening were acquired for a study with Aeon Imaging, EyePACS, University of California Berkeley, and Indiana University...
November 11, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27843241/unusual-course-of-interferon-related-retinopathy-in-chronic-hepatitis-c
#14
Gaurav Mathur, Deependra V Singh, Ayush Singal
Interferon Alfa retinopathy usually presents as cotton wool spots, superficial hemorrhages and macular edema. We describe a rare case of severe retinopathy involving hard exudates at macula that lead to permanent visual loss in one eye. Elderly male presented with diminution of vision in right eye of 8 month duration. He was a diagnosed case of compensated chronic hepatitis C and had received interferon Alfa therapy before. Fundus examination of both eye showed multiple hard exudates at macula with a plaque involving the foveal center in right eye...
September 2016: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/27836962/delayed-neurogenesis-with-respect-to-eye-growth-shapes-the-pigeon-retina-for-high-visual-acuity
#15
Tania Rodrigues, Michal Krawczyk, Dorota Skowronska-Krawczyk, Lidia Matter-Sadzinski, Jean-Marc Matter
The macula and fovea located at the optical centre of the retina make primate visual perception unique among mammals. Our current understanding of retina ontogenesis is primarily based on animal models having no macula and no fovea. However, the pigeon retina and the human macula share a number of structural and functional properties that justify introducing the former as a new model system for retina development. Comparative transcriptome analysis of the pigeon and chicken retinas at different embryonic stages reveals that the pigeon's genetic programs underlying cell differentiation are postponed until the end of the period of cell proliferation...
November 11, 2016: Development
https://www.readbyqxmd.com/read/27836334/neural-adaptation-to-peripheral-blur-in-myopes-and-emmetropes
#16
Atanu Ghosh, Len Zheleznyak, Antoine Barbot, HaeWon Jung, Geunyoung Yoon
In the presence of optical blur at the fovea, blur adaptation can improve visual acuity (VA) and perceived image quality over time. However, little is known regarding blur adaptation in the peripheral retina. Here, we examined neural adaptation to myopic defocus at the fovea and parafovea (10° temporal retina) in both emmetropes and myopes. During the 60-min adaptation period, subjects (3 emmetropes and 3 myopes) watched movies with +2 diopters of defocus blur through a 6-mm artificial pupil in two separate, counter balanced sessions for each retinal location...
November 8, 2016: Vision Research
https://www.readbyqxmd.com/read/27835711/one-year-outcome-of-49-channel-suprachoroidal-transretinal-stimulation-prosthesis-in-patients-with-advanced-retinitis-pigmentosa
#17
Takashi Fujikado, Motohiro Kamei, Hirokazu Sakaguchi, Hiroyuki Kanda, Takao Endo, Masakazu Hirota, Takeshi Morimoto, Kentaro Nishida, Haruhiko Kishima, Yasuo Terasawa, Koji Oosawa, Motoki Ozawa, Kohji Nishida
Purpose: To determine the feasibility of a 49-channel suprachoroidal-transretinal stimulation (STS) retinal prosthesis that was implanted for 1 year. Methods: Three patients with advanced retinitis pigmentosa (RP) and with less than or equal to hand motion (HM) vision were studied. A 49-channel STS system was implanted in a scleral pocket, and the stability of the prosthesis, adverse events, and its efficacy were investigated. Results: The electrode array was implanted in a scleral pocket located under the parafoveal area through a scleral incision at 14 mm in patient (Pt) 1, 16 mm in Pt 2, and 18 mm in Pt 3 from the sclerocorneal limbus...
November 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27828907/correlation-of-microvascular-structures-on-optical-coherence-tomography-angiography-with-visual-acuity-in-retinal-vein-occlusion
#18
Joon-Won Kang, Romi Yoo, Youn Hye Jo, Hyung Chan Kim
PURPOSE: To analyze the correlation of superficial and deep capillary plexuses using optical coherence tomography (OCT) angiography with visual acuity in eyes with retinal vein occlusion (RVO). METHODS: We retrospectively reviewed the medical records of 33 patients with retinal vein occlusion (RVO; branch retinal vein occlusion in 21 patients, central retinal vein occlusion in 11 patients) and included 33 healthy subjects as a control group, who were evaluated by OCT angiography...
November 8, 2016: Retina
https://www.readbyqxmd.com/read/27828905/macular-telangiectasia-type-2-in-an-otherwise-healthy-teenage-boy-with-consanguineous-parents
#19
Christina L Ryu, Mikel Mikhail, Ayesha Khan, John C Chen, Amer Omar
PURPOSE: To report a case of macular telangiectasia Type 2 in a teenage boy with consanguineous parents. METHOD: Clinical case report and literature review. RESULTS: A healthy 14-year-old boy presented with mildly reduced vision in both eyes. Visual acuity was 20/30 in the right eye and 20/25 in the left eye. Fundus examination revealed intraretinal crystals in both eyes and an intraretinal pigment plaque temporal to the fovea in the left eye...
November 8, 2016: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/27822434/seven-year-evaluation-of-idiopathic-multiple-retinal-pigment-epithelium-detachments
#20
Pawel Krasnicki, Diana Dmuchowska, Ewa Zukowska, Zofia Mariak
Objective: To analyze a 7-year natural history of idiopathic multiple retinal pigment epithelium (RPE) detachment based on optical coherence tomography (OCT) images. Methods: Case report. SD-OCT imaging (Topcon 3D OCT-1000). Results: A 55-year-old female presented with three foci of pigment epithelium detachment (PED) in her left eye. Her past ophthalmic and medical history was uneventful. The patient's visual acuity in both eyes was 1.0 throughout the follow-up period. Fluorescein angiography images are shown...
2016: GMS Ophthalmology Cases
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