Academic literature on the topic 'Retina Implant'

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Journal articles on the topic "Retina Implant"

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Koitschev, Assen, Katarina Stingl, Karl Ulrich Bartz-Schmidt, et al. "Extraocular Surgical Approach for Placement of Subretinal Implants in Blind Patients: Lessons from Cochlear-Implants." Journal of Ophthalmology 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/842518.

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In hereditary retinal diseases photoreceptors progressively degenerate, often causing blindness without therapy being available. Newly developed subretinal implants can substitute functions of photoreceptors. Retina implant extraocular surgical technique relies strongly on cochlear-implant know-how. However, a completely new surgical approach providing safe handling of the photosensor array had to be developed. The Retina Implant Alpha IMS consisting of a subretinal microphotodiode array and cable linked to a cochlear-implant-like ceramic housing was introduced via a retroauricular incision th
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Kusnyerik, Ákos, Miklós Resch, Tamás Roska, et al. "Vision restoration with implants in retinal degenerations." Orvosi Hetilap 152, no. 14 (2011): 537–45. http://dx.doi.org/10.1556/oh.2011.29064.

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Up until now there has been no available treatment for diseases causing the permanent impairment of retinal photoreceptors. Currently the development of the retinal prostheses is the earliest to promise a result that can be implemented in the clinical treatment of these patients. Implants with different operating principles and in various stages of progress are presented in details, highlighting the characteristics, as well as the Hungarian aspects of the development. This survey intends to provide an overview on retinal prostheses, implantable in case of degenerative diseases of the retina, b
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Greco, Jordan A., Nicole L. Wagner, Ralph J. Jensen, et al. "Activation of retinal ganglion cells using a biomimetic artificial retina." Journal of Neural Engineering 18, no. 6 (2021): 066027. http://dx.doi.org/10.1088/1741-2552/ac395c.

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Abstract Objective. Biomimetic protein-based artificial retinas offer a new paradigm for restoring vision for patients blinded by retinal degeneration. Artificial retinas, comprised of an ion-permeable membrane and alternating layers of bacteriorhodopsin (BR) and a polycation binder, are assembled using layer-by-layer electrostatic adsorption. Upon light absorption, the oriented BR layers generate a unidirectional proton gradient. The main objective of this investigation is to demonstrate the ability of the ion-mediated subretinal artificial retina to activate retinal ganglion cells (RGCs) of
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Shelke, D. A., and S. Shirolkar. "DRUG DELIVERY TO RETINA: A REVIEW." INDIAN DRUGS 56, no. 09 (2019): 7–21. http://dx.doi.org/10.53879/id.56.09.11991.

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The drug delivery to posterior segment especially to retina of eye is difficult due to various barriers. The diseases affecting the retina of eye are increasing and hence there is need to develop approaches for drug delivery to retina. This review describes the anatomy of retina, barriers associated with it, and diseases of retina. The drug delivery to retina by systemic, topical, intravitreal injection, intravitreal implant along with advance nanotechnology based and transporter mediated drug delivery is discussed here. The recent technologies in retinal drug delivery are also discussed to gi
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Ho, Elton, Richard Smith, Georges Goetz, et al. "Spatiotemporal characteristics of retinal response to network-mediated photovoltaic stimulation." Journal of Neurophysiology 119, no. 2 (2018): 389–400. http://dx.doi.org/10.1152/jn.00872.2016.

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Subretinal prostheses aim at restoring sight to patients blinded by photoreceptor degeneration using electrical activation of the surviving inner retinal neurons. Today, such implants deliver visual information with low-frequency stimulation, resulting in discontinuous visual percepts. We measured retinal responses to complex visual stimuli delivered at video rate via a photovoltaic subretinal implant and by visible light. Using a multielectrode array to record from retinal ganglion cells (RGCs) in the healthy and degenerated rat retina ex vivo, we estimated their spatiotemporal properties fro
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Elliott, Michael S., and Sandra R. Montezuma. "Retina Injury After Dexamethasone Injection Into a Vitrectomized Eye." Journal of VitreoRetinal Diseases 4, no. 6 (2020): 538–40. http://dx.doi.org/10.1177/2474126420934238.

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Purpose: This work reports a case of retinal and vitreous hemorrhage after a dexamethasone (Ozurdex, Allergan) intravitreal implant injection to treat clinically significant macular edema (ME) in a patient with moderate nonproliferative diabetic retinopathy. Methods: A 61-year-old woman who had a vitrectomy 3 years prior in the right eye underwent intravitreal dexamethasone implant injection in the right eye. Immediately after the injection, the patient noted numerous floaters, with visual acuity decline from 20/30 before injection, to counting fingers at 3 feet after injection. Dilated examin
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Greco, Jordan A., Luis André L. Fernandes, Nicole L. Wagner, et al. "Pixel Characterization of a Protein-Based Retinal Implant Using a Microfabricated Sensor Array." International Journal of High Speed Electronics and Systems 26, no. 03 (2017): 1740012. http://dx.doi.org/10.1142/s0129156417400122.

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Retinal degenerative diseases are characterized by the loss of photoreceptor cells within the retina and affect 30-50 million people worldwide. Despite the availability of treatments that slow the progression of degeneration, affected patients will go blind. Thus, there is a significant need for a prosthetic that is capable of restoring functional vision for these patients. The protein-based retinal implant offers a high-resolution option for replacing the function of diseased photoreceptor cells by interfacing with the underlying retinal tissue, stimulating the remaining neural network, and t
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Cai, Youran, Ye Yang, and Xin Zhong. "A Case Report of Intravitreal Dexamethasone Implant with Exudative Retinal Detachment for Ocular Toxocariasis Treatment." Korean Journal of Parasitology 60, no. 2 (2022): 133–37. http://dx.doi.org/10.3347/kjp.2022.60.2.133.

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Toxocariasis is one of the most common geohelminth infections in several parts of the world. We describe a rare case of ocular toxocariasis with secondary exudative retinal detachment treated with albendazole and an intravitreal dexamethasone implant. A 13-year-old boy with counting finger vision was diagnosed with retinal vasculitis and exudative retinal detachment in his right eye. Fundoscopic examination revealed retinal hemorrhage, retinal vasculitis, and exudative retinal detachment. Serological test using serum and intraocular aqueous humor were positive for anti-Toxocara specific IgG an
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Christensen, Logan, Riley Sanders, and Jeffrey Olson. "“Magic Bullet”: Eccentric Macular Hole as a Complication from Dexamethasone Implant Insertion." Case Reports in Ophthalmological Medicine 2016 (2016): 1–3. http://dx.doi.org/10.1155/2016/1706234.

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Introduction. Intravitreal drug injections and implants are generally safe but do carry some risk, from both the procedure itself and adverse effects of the medications. We report a case of an eccentric macular hole after dexamethasone implant (Ozurdex®) administration.Ex vitroforce testing was performed to evaluate dexamethasone implant injection force.Methods. Five dexamethasone implant (Ozurdex) applicators were placed 16 mm from a force plate and the force of the injected dexamethasone pellet was recorded in Newtons. Four dexamethasone implant applicators were placed 16 mm from a force pla
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Alavanthar, T., and V. Ellappan. "Stimulating electrode Design for Implantable Sub Retina Research Application: A Novel Approach." International Journal of Engineering & Technology 7, no. 2.24 (2018): 570. http://dx.doi.org/10.14419/ijet.v7i2.24.12509.

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This paper aims to study and converse the theoretical model of neural stimulation implant electrodes with the electrochemical aspects of design. The study investigates the practically realizable hypothetical model of minimal invasive retinal implant (miRI) stimulating electrodes for restoring lost sight of patients blinded by degenerative retinal diseases. The basic elemental methods of charge injection by the stimulation electrode to tissue are pointed out. A prologue on the developments of vision implants and electrode characteristics were presented. We communicated the most important factor
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Dissertations / Theses on the topic "Retina Implant"

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Rojahn, Martin. "Encapsulation of a retina implant /." [S.l. : s.n.], 2003. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10378693.

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Eger, Marcus. "Informationstheoretische Methoden für die funktionelle Anpassung von Retina-Implant-Parametern." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=965645576.

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Serrano, Guillermo J. "Floating-gate digital to analog converter for retinal implant applications." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/13312.

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Wilms, Marcus. "Electrical receptive fields and cortical activation spread in response to electrical retina stimulation assessment of spatio-temporal resolution for a retina implant /." [S.l.] : [s.n.], 2001. http://archiv.ub.uni-marburg.de/diss/z2002/0084/.

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Almeida, Felipe Piacentini Paes de. "Estudo da farmacocinética vítrea e toxicidade da ciclosporina intravítrea em olhos de coelhos." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/17/17150/tde-21102013-122223/.

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O tratamento de pacientes com doenças inflamatórias oculares crônicas frequentemente implica no uso prolongado de drogas anti-inflamatórias sistêmicas como, corticosteroides e outros imunossupressores, podendo acarretar efeitos colaterais importantes. O uso local destas drogas pode contribuir para aumentar seus efeitos desejáveis e reduzir os efeitos colaterais. Implantes intraoculares biodegradáveis são capazes de disponibilizar o fármaco diretamente na cavidade vítrea em doses terapêuticas por período prolongado. O copolímero do ácido lático e glicólico (PLGA) é um clássico exemplo entre os
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Matonti, Frédéric. "Analyse de la réponse rétinienne et corticale à la stimulation électrique par implant sous-rétinien sur le modèle murin." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM5098.

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L’objectif de cette thèse est la validation fonctionnelle d’implants rétiniens pour la restauration fonctionnelle de la vision chez des patients non voyants suite à la perte de leurs photorécepteurs. Ce travail a été réalisé sur modèle animal et a évalué expérimentalement de nouveaux protocoles de stimulation. Tout d’abord nous avons utilisé la technique de spectroscopie d’impédance pour simuler mathématiquement l’interface tissu-implantafin de caractériser la présence d’un espace entre le tissu et l’implant. La seconde partie compare par imagerie optique (IO) les caractéristiques de la répons
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Pérez, Delgado José Delfín. "Prótese implanto‒suportada aparafusada vs. cimentada." Master's thesis, [s.n.], 2015. http://hdl.handle.net/10284/5069.

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Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária<br>A procura de reabilitações orais cada vez mais próximas dos dentes naturais contribuiu para a evolução das técnicas de reabilitação oral, nomeadamente na área da implantologia, onde atualmente são levantados vários paradigmas, entre os quais se encontra a discussão entre a utilização de próteses cimentadas versus as próteses aparafusadas. Neste trabalho é feita uma revisão da literatura e uma comparação em relação aos dois tipos
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Alves, Suleima do Vale. "Análise da durabilidade, retenção e tensão em overdentures retidas por implantes associadas ou não a mini-implantes posteriores." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-01092017-102655/.

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O objetivo desse estudo in vitro foi analisar a durabilidade, retenção e tensão gerada nos implantes de overdenture retidas por sistema bola/O\'ring ou barra/clipe, associados ou não a mini-implantes na região posterior da mandíbula. Foram utilizados implantes anteriores cone-Morse (3,75 x 11 mm) e mini-implantes de corpo único (2 x 10 mm) e os grupos divididos em (n=12): G2O: overdenture sobre 2 implantes com bola/O´rings; G1B: overdenture sobre 2 implantes com barra/clipe; G4O: overdenture sobre 2 implantes com bola/O´rings e 2 mini-implantes na região posterior; G1B2O: overdenture sobre 2 i
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Nogueira, Túlio Eduardo. "Avaliação clínico-radiográfica e estabilidade implantar em overdenture mandibular retida por implante unitário." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/4208.

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Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2015-03-02T14:42:20Z No. of bitstreams: 2 Dissertação - Tulio Eduardo Nogueira - 2014.pdf: 2052325 bytes, checksum: a10ec63df3d099550385e5493ffd24d6 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2015-03-02T15:29:11Z (GMT) No. of bitstreams: 2 Dissertação - Tulio Eduardo Nogueira - 2014.pdf: 2052325 bytes, checksum: a10ec63df3d099550385e5493ffd24d6 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<
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Olate, Morales Sergio Adrian. "Estudo morfométrico da estrutura óssea crâniofacial visando a reabilitação com prótese facial retida em implantes extrabucais." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289448.

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Orientador: José Ricardo de Albergaria Barbosa<br>Tese (doutorado) - Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-16T04:25:57Z (GMT). No. of bitstreams: 1 OlateMorales_SergioAdrian_D.pdf: 2241387 bytes, checksum: f35c455160e70ece3b0c4ef20a1abce8 (MD5) Previous issue date: 2010<br>Resumo: Os implantes craniofaciais têm sido empregadas para obter retenção e suporte de estruturas protéticas faciais sendo útil em pacientes com seqüelas pelo tratamento do câncer, tumores, trauma ou malformações. O objetivo deste estudo descritivo
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Books on the topic "Retina Implant"

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Haq, Wadood Mohammad Abdul. The origin and mechanism of the spontaneous activity in the rd1 mouse retina and a proof of principle for the function of a chemical retinal implant. s.n.], 2012.

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Leopoldina-Symposium (2009 Warnemünde, Rostock, Germany). Intelligent implants in ophthalmology. Edited by Guthoff Rudolf, Schmitz Klaus-Peter, Zrenner Eberhart 1945-, and Universität Rostock. Deutsche Akademie der Naturforscher Leopoldina, 2010.

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A, Schulman Joel, ed. Vitreous substitutes. Appleton & Lange, 1995.

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Weiland, James D., Gerald Chader, Mark S. Humayun, and Elias Greenbaum. Artificial Sight: Basic Research, Biomedical Engineering, and Clinical Advances. Springer London, Limited, 2007.

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Artificial sight: Basic research, biomedical engineering, and clinical advances. Springer Verlag, 2007.

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Weiland, James D., Gerald Chader, Mark S. Humayun, and Elias Greenbaum. Artificial Sight: Basic Research, Biomedical Engineering, and Clinical Advances. Springer New York, 2010.

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(Editor), Mark S. Humayun, James D. Weiland (Editor), Gerald Chader (Editor), and Elias Greenbaum (Editor), eds. Artificial Sight: Basic Research, Biomedical Engineering, and Clinical Advances (Biological and Medical Physics, Biomedical Engineering). Springer, 2007.

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Prakash Rai, Dibya, ed. Advanced Materials and Nano Systems: Theory and Experiment (Part-1). BENTHAM SCIENCE PUBLISHERS, 2022. http://dx.doi.org/10.2174/97898150507451220101.

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The discovery of new materials and the manipulation of their exotic properties for device fabrication is crucial for advancing technology. Nanoscience and the creation of nanomaterials have taken materials science and electronics to new heights for the benefit of mankind. Advanced Materials and Nanosystems: Theory and Experiment cover several topics of nanoscience research. The compiled chapters aim to update students, teachers, and scientists by highlighting modern developments in materials science theory and experiments. The significant role of new materials in future technology is also demo
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Book chapters on the topic "Retina Implant"

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Kwon, Jae-Sung, Raviraj Thakur, Steven T. Wereley, et al. "Retina Implant." In Encyclopedia of Nanotechnology. Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100706.

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Becker, M., M. Braun, and R. Eckmiller. "Retina Encoder Inversion for Retina Implant Simulation." In ICANN 98. Springer London, 1998. http://dx.doi.org/10.1007/978-1-4471-1599-1_122.

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Meyer, J. Uwe. "Retina Implant — A BioMEMS Challenge." In Transducers ’01 Eurosensors XV. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59497-7_3.

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Gerding, Heinrich. "The Minimally Invasive Retina Implant Project." In Visual Prosthesis and Ophthalmic Devices. Humana Press, 2007. http://dx.doi.org/10.1007/978-1-59745-449-0_7.

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Hahn, Paul. "What Is the Artificial Retinal Prosthesis (Argus II Implant) and Who Would Be a Good Candidate for It?" In Curbside Consultation in Retina, 2nd ed. CRC Press, 2024. http://dx.doi.org/10.1201/9781003523703-39.

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Becker, Michael, and Rolf Eckmiller. "Spatio-temporal filter adjustment from evaluative feedback for a retina implant." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/bfb0020311.

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Zhu, Yimei, Hiromi Inada, Achim Hartschuh, et al. "Sub-retinal Implant." In Encyclopedia of Nanotechnology. Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100802.

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Weiss, Jeffrey N. "Retinal Implant Studies." In Visual Prosthesis. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-06620-7_6.

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Kelly, Shawn K., and Joseph Rizzo. "The Boston Retinal Implant." In Artificial Vision. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41876-6_7.

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Loudin, James, Alexander Butterwick, Philip Huie, and Daniel Palanker. "Delivery of Information and Power to the Implant, Integration of the Electrode Array with the Retina, and Safety of Chronic Stimulation." In Visual Prosthetics. Springer US, 2011. http://dx.doi.org/10.1007/978-1-4419-0754-7_7.

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Conference papers on the topic "Retina Implant"

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Nashashibi, Shadi, Stefan M. Koepfli, Raphael Schwanninger, et al. "Graphene Photogating Devices for Retinal Implants." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.atu4b.5.

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We demonstrate a graphene-based phototransistor array with a dynamic range of six orders of magnitude starting from 7 lux. These devices feature a biomimetic logarithmic power dependence and are thus of interest for retinal implants.
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Banerjee, Rupak K., Robert J. Lutz, Keyvan Keyhani, Robert L. Dedrick, Brian King, and Michael Robinson. "Comparison of Drug Distribution Between Intravitreal Injection and a Controlled–Release Implant in a Rabbit Eye." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-2235.

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Abstract Due to physiological barriers within the eye, which limit penetration of many drugs from the systemic circulation into the vitreous, the most common method of treating retinal disease is direct intravitreal injection. However, this common procedure may be inappropriate for a wide range of drugs as it may lead to highly variable concentrations potentially causing higher toxicity for tissues inside the eye and limiting therapeutic effect. A recent procedure is to use surgically implanted drug release device, called implant here, in the vitreous of the eye that allow controlled release o
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Karagoz, Irfan, and Mustafa Ozden. "Adaptive artificial retina model to improve perception quality of retina implant recipients." In 2011 4th International Conference on Biomedical Engineering and Informatics (BMEI). IEEE, 2011. http://dx.doi.org/10.1109/bmei.2011.6098353.

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Schloesser, Mario, O. Cota, R. Heil, et al. "Embedded device for simultaneous recording and stimulation for retina implant research." In 2013 IEEE Sensors. IEEE, 2013. http://dx.doi.org/10.1109/icsens.2013.6688173.

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Suaning, G. J., N. H. Lovell, and T. Lehmann. "Neuromodulation of the retina from the suprachoroidal space: The Phoenix 99 implant." In 2014 IEEE Biomedical Circuits and Systems Conference (BioCAS). IEEE, 2014. http://dx.doi.org/10.1109/biocas.2014.6981711.

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Raffelberg, Pascal, Roman Burkard, Reinhard Viga, et al. "Current Controlled CMOS Stimulator with Programmable Pulse Pattern for a Retina Implant." In 2018 14th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME). IEEE, 2018. http://dx.doi.org/10.1109/prime.2018.8430332.

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Bremus-Köbberling, E., H. Ch Lüdtke-Handjery, A. Gillner, et al. "Laser microperforation of poly(dimethylsiloxane) (PDMS) for the durable fixation of a retina implant." In ICALEO® ‘99: Proceedings of the Laser Microfabrication Conference. Laser Institute of America, 1999. http://dx.doi.org/10.2351/1.5059316.

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Raffelberg, Pascal, Florian Waschkowski, Reinhard Viga, Wilfried Mokwa, Peter Walter, and Rainer Kokozinski. "Design of a CMOS image sensor and stimulation IC for a wide-angle retina implant." In 2017 13th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME). IEEE, 2017. http://dx.doi.org/10.1109/prime.2017.7974169.

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Park, Juyoung, Peter M. Bungay, Robert J. Lutz, et al. "Comparison of Convective Transport of Drug Between Intravitreal Injection and Controlled Release Implant." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59300.

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It is important to know the drug distribution following administration of drug in order to properly treat with adequate dosage and thus, avoid damage to tissues due to excessive high concentrations. A computer model was developed to determine drug distribution by convective-diffusive transport processes in a rabbit eye. When compared with pure diffusion within vitreous, the ratio of the amount of a model compound, fluorescein, reaching the retina to that cleared by aqueous outflow increased by 93% and 84% for intravitreal injection and implant, respectively, with maximum vitreous outflow (glau
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Heil, R., M. Schloesser, A. Offenhausser, S. v. Waasen, and M. Schiek. "Automated electrical stimulation and recording for retina implant research by LabVIEW configured standalone data acquisition device." In 2014 53rd Annual Conference of the Society of Instrument and Control Engineers of Japan (SICE). IEEE, 2014. http://dx.doi.org/10.1109/sice.2014.6935289.

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