Read by QxMD icon Read


E Castaldi, G M Cicchini, L Cinelli, L Biagi, S Rizzo, M C Morrone
Retinal prosthesis technologies require that the visual system downstream of the retinal circuitry be capable of transmitting and elaborating visual signals. We studied the capability of plastic remodeling in late blind subjects implanted with the Argus II Retinal Prosthesis with psychophysics and functional MRI (fMRI). After surgery, six out of seven retinitis pigmentosa (RP) blind subjects were able to detect high-contrast stimuli using the prosthetic implant. However, direction discrimination to contrast modulated stimuli remained at chance level in all of them...
October 2016: PLoS Biology
Joseph G Christenbury, Nopasak Phasukkijwatana, Anna Tan, K Bailey Freund, David Sarraf
PURPOSE: To describe two cases of dome-shaped macula (DSM) and serous macular detachment, the diagnosis of which was enhanced with a radial optical coherence tomography (OCT) scanning protocol. METHODS: Retrospective case series of DSM associated with serous macular detachment. Multimodal retinal imaging was performed including spectral domain OCT with a radial scan protocol and en face OCT angiography. Anatomical outcomes before and after therapy are presented...
September 30, 2016: Retinal Cases & Brief Reports
Julia Nemiroff, Nopasak Phasukkijwatana, Veronika Vaclavik, Aaron Nagiel, Eric R Holz, David Sarraf
PURPOSE: To describe the multimodal imaging findings, including optical coherence tomography angiography analysis, and spectrum of etiologies associated with Amalric triangular choroidal infarction. METHODS: This study is a multicenter, retrospective, observational case series review of the clinical and multimodal imaging findings for six patients with Amalric triangular choroidal infarction. RESULTS: Six patients (10 eyes) with Amalric triangular choroidal infarction were enrolled...
October 11, 2016: Retinal Cases & Brief Reports
Maria V Cicinelli, Adriano Carnevali, Alessandro Rabiolo, Lea Querques, Ilaria Zucchiatti, Vincenzo Scorcia, Francesco Bandello, Giuseppe Querques
PURPOSE: To describe macular-foveal capillaries (MFC) by means of optical coherence tomography angiography and to identify the clinical spectrum of this angiographic feature. METHODS: Patients with MFC presenting at the Medical Retina & Imaging Unit of the Department of Ophthalmology, University Vita-Salute San Raffaele in Milan were recruited. Patients underwent a complete ophthalmologic examination that included slit-lamp examination, fundus examination, measurement of best-corrected visual acuity, fundus autofluorescence, and spectral-domain optical coherence tomography (Spectralis HRA + OCT; Heidelberg Engineering, Heidelberg, Germany)...
July 12, 2016: Retina
Hashim Ali Khan, Muhammad Aamir Shahzad
PURPOSE: To report a case of atypical serpiginous choroiditis with previously unreported findings on optical coherence tomographic angiography. CASE REPORT: A 35-year-old otherwise healthy man had a 1-week history of vision loss in his right eye. The visual acuity in right eye was counting fingers at 1 meter. Fundoscopy showed a classic peripapillary serpiginous lesion and a solitary macular lesion. Fundus fluorescein angiography revealed early hypofluorescence of active lesions with gradual increase in fluorescence across the phase of angiogram...
October 25, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Yong Cheng, Xuan Shi, Jin-Feng Qu, Ming-Wei Zhao, Xiao-Xin Li
BACKGROUND: Polypoidal choroidal vasculopathy (PCV) is characterized by the presence of polyps with or without a branching vascular network and more prevalent among Asians. The aim of this study was to compare the outcomes of conbercept therapy between two different angiographic subtypes of PCV. METHODS: Fifty-eight patients of PCV were classified into two phenotypes according to indocyanine green angiography (ICGA). In Type 1, both feeder and draining vessels are visible on ICGA and network vessels are numerous...
2016: Chinese Medical Journal
Ygal Rotenstreich, Adi Tzameret, Sapir E Kalish, Ettel Bubis, Michael Belkin, Iris Moroz, Mordechai Rosner, Itay Levy, Shlomo Margel, Ifat Sher
PURPOSE: To investigate the feasibility and safety of a novel minimally invasive adjustable-depth blunt injector for pharmaceuticals delivery into the posterior segment. METHODS: Indocyanine green (ICG), sodium fluorescein and iron oxide nanoparticles (IONPs) were injected using the new injector into the extravascular spaces of the choroid (EVSC) compartment of rabbits and cadaver pig eyes. Spectral domain optical coherence tomography (SD-OCT), fundus imaging and histology analysis were performed for assessment of injection safety and efficacy...
October 25, 2016: Acta Ophthalmologica
Joo Youn Shin, Byunghoon Chung, Yun Hyup Na, Jonghyun Lee, Hyewon Chung, Suk Ho Byeon
PURPOSE: The aim of this study was to investigate wound healing in the retinal pigment epithelium (RPE) after traumatic indirect choroidal rupture using fundus autofluorescence (FAF) and spectral-domain optical coherence tomography (SD-OCT). METHODS: A total of 14 eyes of 14 patients with traumatic indirect choroidal rupture were included. Baseline and last follow-up FAF images were compared to evaluate the extent of RPE healing after choroidal rupture, and associated morphologic characteristics were examined by SD-OCT...
October 24, 2016: Acta Ophthalmologica
Delila Hodzic-Hadzibegovic, Shakoor Ba-Ali, Marianne Valerius, Henrik Lund-Andersen
PURPOSE: To quantify the fluid resorption from the centre of the fovea in a pregnant woman with diabetic macular oedema by daily optical coherence tomography (OCT) measurements after the administration of intravitreal dexamethasone implant (Ozurdex(®) ). METHODS: A 36-year-old pregnant woman with type 1 diabetes for 33 years presented with diabetic macular oedema with foveal serous detachment and symptomatic vision loss at 16 gestational weeks. Best-corrected visual acuity (BCVA) in Snellen notation and central retinal volume assessed by optical coherence tomography (OCT, Topcon Corporation) were measured almost on a daily basis the first five weeks after implantation and then 2-3 times per month until childbirth...
October 24, 2016: Acta Ophthalmologica
Daniel Shu Wei Ting, Kara-Anne Tan, Val Phua, Gavin Siew Wei Tan, Chee Wai Wong, Tien Yin Wong
Diabetic retinopathy (DR), a leading cause of acquired vision loss, is a microvascular complication of diabetes. While traditional risk factors for diabetic retinopathy including longer duration of diabetes, poor blood glucose control, and dyslipidemia are helpful in stratifying patient's risk for developing retinopathy, many patients without these traditional risk factors develop DR; furthermore, there are persons with long diabetes duration who do not develop DR. Thus, identifying biomarkers to predict DR or to determine therapeutic response is important...
December 2016: Current Diabetes Reports
Paula Castro, Shahid Zaman, Anthony Holland
People with Down's syndrome (DS) are at high risk for developing Alzheimer's disease (AD) at a relatively young age. This increased risk is not observed in people with intellectual disabilities for reasons other than DS and for this reason it is unlikely to be due to non-specific effects of having a neurodevelopmental disorder but, instead, a direct consequence of the genetics of DS (trisomy 21). Given the location of the amyloid precursor protein (APP) gene on chromosome 21, the amyloid cascade hypothesis is the dominant theory accounting for this risk, with other genetic and environmental factors modifying the age of onset and the course of the disease...
October 24, 2016: Journal of Neurology
Bose Karthikeyan, Lakshminarasimhan Harini, Vaithilingam Krishnakumar, Velu Rajesh Kannan, Krishnan Sundar, Thandavarayan Kathiresan
Endoplasmic reticulum (ER) stress-mediated apoptosis is a well-known factor in the pathogenesis of age-related macular degeneration (AMD). ER stress leads to accumulation of misfolded proteins, which in turn activates unfolded protein response (UPR) of the cell for its survival. The prolonged UPR of ER stress promotes cell death; however, the transition between adaptation and ER stress-induced apoptosis has not been clearly understood. Hence, the present study investigates the regulatory effect of (-)-epigallocatechin gallate (EGCG) on ER stress-induced by hydrogen peroxide (H2O2) and disturbance of calcium homeostasis by thapsigargin (TG) in mouse retinal pigment epithelial (MRPE) cells...
October 24, 2016: Apoptosis: An International Journal on Programmed Cell Death
Javeria Amin, Muhammad Sharif, Mussarat Yasmin
Diabetic retinopathy is caused by the retinal micro vasculature which may be formed as a result of diabetes mellitus. Blindness may appear as a result of unchecked and severe cases of diabetic retinopathy. Manual inspection of fundus images to check morphological changes in microaneurysms, exudates, blood vessels, hemorrhages, and macula is a very time-consuming and tedious work. It can be made easily with the help of computer-aided system and intervariability for the observer. In this paper, several techniques for detecting microaneurysms, hemorrhages, and exudates are discussed for ultimate detection of nonproliferative diabetic retinopathy...
2016: Scientifica
Yule Xu, Ao Rong, Yanlong Bi, Wei Xu
Purpose. To evaluate the efficacy of intravitreal conbercept (IVC) plus modified grid laser photocoagulation (MGP) versus IVC alone for treatment of diffuse diabetic macular edema (DDME). Methods. In this retrospective study, 51 DDME patients were treated with either IVC alone (IVC group) or IVC plus MGP (combined group) with 12 months of follow-up. The clinical records of those patients were reviewed. Results. 26 patients (31 eyes) received IVC alone and 25 patients (30 eyes) received combined therapy. At month 12, the mean best-corrected visual acuity (BCVA) letter score improvement was 9...
2016: Journal of Ophthalmology
Sara J Bowne, Lori S Sullivan, Dianna K Wheaton, Kirsten G Locke, Kaylie D Jones, Daniel C Koboldt, Robert S Fulton, Richard K Wilson, Susan H Blanton, David G Birch, Stephen P Daiger
PURPOSE: To identify the underlying cause of disease in a large family with North Carolina macular dystrophy (NCMD). METHODS: A large four-generation family (RFS355) with an autosomal dominant form of NCMD was ascertained. Family members underwent comprehensive visual function evaluations. Blood or saliva from six affected family members and three unaffected spouses was collected and DNA tested for linkage to the MCDR1 locus on chromosome 6q12. Three affected family members and two unaffected spouses underwent whole exome sequencing (WES) and subsequently, custom capture of the linkage region followed by next-generation sequencing (NGS)...
2016: Molecular Vision
Chantal Dysli, Muriel Dysli, Martin S Zinkernagel, Volker Enzmann
Fluorescence lifetime imaging ophthalmoscopy (FLIO) was used to investigate retinal autofluorescence lifetimes in mouse models of pharmacologically induced retinal degeneration over time. Sodium iodate (NaIO3, 35 mg/kg intravenously) was used to induce retinal pigment epithelium (RPE) degeneration with subsequent loss of photoreceptors (PR) whereas N-methyl-N-nitrosourea (MNU, 45 mg/kg intraperitoneally) was employed for degeneration of the photoreceptor cell layer alone. All mice were measured at day 3, 7, 14, and 28 after the respective injection of NaIO3, MNU or NaCl (control)...
October 21, 2016: Experimental Eye Research
John D Hulleman, Joseph C Genereux, Annie Nguyen
Fibulin-3 (F3) is an important, disulfide-rich, extracellular matrix glycoprotein that has been associated with a number of diseases ranging from cancer to retinal degeneration. An Arg345Trp (R345W) mutation in F3 causes the rare, autosomal dominant macular dystrophy, Malattia Leventinese. The purpose of this study was to identify and validate novel intracellular interacting partners of wild-type (WT) and R345W F3 in retinal pigment epithelium cells. We used stable isotope labeling by amino acids in cell culture (SILAC) to generate 'heavy' and 'light' isotopically labeled ARPE-19 cell populations which were subsequently infected with adenovirus encoding for FLAG-tagged (FT) WT or R345W F3...
October 21, 2016: Experimental Eye Research
Rumi Hisakata, Daisuke Hayashi, Ikuya Murakami
The static envelope of a Gabor patch with a moving sinusoidal carrier appears shifted in the direction of the carrier motion (De Valois & De Valois, 1991). This phenomenon is called motion-induced position shift. Although several motion-processing stages, ranging from low- to high-level processes, may contribute to position estimation, it is unknown whether a binocular matching stage or an even earlier stage exerts an influence. To elucidate this matter, we investigated the disparity tuning of this illusion by manipulating the binocular disparities of the carrier and the envelope...
October 1, 2016: Journal of Vision
Koji M Nishiguchi, Yu Yokoyama, Yusuke Fujii, Kosuke Fujita, Yusuke Tomiyama, Ryo Kawasaki, Toshinori Furukawa, Fumiko Ono, Nobuhiro Shimozawa, Mutsumi Togo, Michihiro Suzuki, Toru Nakazawa
Age-dependent formation of macular drusen caused by the focal accumulation of extracellular deposits beneath the retinal pigment epithelium precede the development of age-related macular degeneration (AMD), one of the leading causes of blindness worldwide. It is established that inflammation contributes to the pathogenesis of drusen and AMD. However, development of a preemptive therapeutic strategy targeting macular drusen and AMD has been impeded by the lack of relevant animal models because most laboratory animals lack macula, an anatomic feature present only in humans and a subset of monkeys...
2016: PloS One
Seung Hoon Kim, Eun Jung Lee, Jong Chul Han, Sae Woon Sohn, Taekkwan Rhee, Changwon Kee
PURPOSE: To investigate whether diurnal fluctuation in intraocular pressure (IOP) can influence the result of the correlations between IOP-related factors and progression of normal tension glaucoma (NTG). METHODS: Glaucoma progression was defined as visual field (VF) progression and changes in the optic disc and/or retinal nerve fiber layer (RNFL). Two different methods were used to evaluate the impact of the diurnal fluctuation in IOP. 'Conventional method' used in previous studies included all IOP measurements during the follow up time...
2016: PloS One
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"