Academic literature on the topic 'Lens'

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Journal articles on the topic "Lens"

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Kurosaka, Daijiro, Toshiyasu Imaizumi, and Junya Kizawa. "Time Course of Lens Epithelial Cell Behavior in Rabbit Eyes following Lens Extraction and Implantation of Intraocular Lens." Journal of Ophthalmology 2021 (January 16, 2021): 1–8. http://dx.doi.org/10.1155/2021/6659838.

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Background. After cataract surgery, some lens epithelial cells (LECs) transdifferentiate into myofibroblast-like cells, which causes fibric posterior capsule opacification (PCO). Residual LECs differentiate into lens fiber cells, forming Elschnig pearls with PCO. This study was carried out to identify the time course of both types of LEC behavior in rabbit eyes following lens extraction and implantation of an intraocular lens (IOL). Methods. Phacoemulsification and implantation of posterior chamber IOLs were performed in rabbit eyes. Following enucleation, immunohistochemical methods were used
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Novo, Samuel G., Adam P. Faranda, Mahbubul H. Shihan, Yan Wang, Ananya Garg, and Melinda K. Duncan. "The Immediate Early Response of Lens Epithelial Cells to Lens Injury." Cells 11, no. 21 (2022): 3456. http://dx.doi.org/10.3390/cells11213456.

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Cataracts are treated by lens fiber cell removal followed by intraocular lens (IOL) implantation into the lens capsule. While effective, this procedure leaves behind numerous lens epithelial cells (LECs) which undergo a wound healing response that frequently leads to posterior capsular opacification (PCO). In order to elucidate the acute response of LECs to lens fiber cell removal which models cataract surgery (post cataract surgery, PCS), RNA-seq was conducted on LECs derived from wild type mice at 0 and 6 h PCS. This analysis found that LECs upregulate the expression of numerous proinflammat
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Xiong, Lang, Yan Sun, Jingqi Huang, et al. "Long Non-Coding RNA H19 Prevents Lens Fibrosis through Maintaining Lens Epithelial Cell Phenotypes." Cells 11, no. 16 (2022): 2559. http://dx.doi.org/10.3390/cells11162559.

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The integrity of lens epithelial cells (LECs) lays the foundation for lens function and transparency. By contrast, epithelial-mesenchymal transition (EMT) of LECs leads to lens fibrosis, such as anterior subcapsular cataracts (ASC) and fibrotic forms of posterior capsule opacification (PCO). However, the underlying mechanisms remain unclear. Here, we aimed to explore the role of long non-coding RNA (lncRNA) H19 in regulating TGF-β2-induced EMT during lens fibrosis, revealing a novel lncRNA-based regulatory mechanism. In this work, we identified that lncRNA H19 was highly expressed in LECs, but
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Andjelic, Sofija, and Marko Hawlina. "Human Primary Lens Epithelial Cultures on Basal Laminas Studied by Synchrotron-Based FTIR Microspectroscopy for Understanding Posterior Capsular Opacification." International Journal of Molecular Sciences 25, no. 16 (2024): 8858. http://dx.doi.org/10.3390/ijms25168858.

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Human primary lens epithelial cultures serve as an in vitro model for posterior capsular opacification (PCO) formation. PCO occurs when residual lens epithelial cells (LECs) migrate and proliferate after cataract surgery, differentiating into fibroblastic and lens fiber-like cells. This study aims to show and compare the bio-macromolecular profiles of primary LEC cultures and postoperative lens epithelia LECs on basal laminas (bls), while also analyzing bls and cultured LECs separately. Using synchrotron radiation-based Fourier transform infrared (SR-FTIR) (Bruker, Karlsruhe, Germany) microspe
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Syu, Yong-Sin, and Yung-Chun Lee. "Quantitative Evaluation of Light Collimating for Commercial UV-LEDs Based on Analytic Collimating Lens." Applied Sciences 12, no. 2 (2022): 911. http://dx.doi.org/10.3390/app12020911.

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This paper proposes a lens design method for effectively collimating the light emitting from a light-emitting diode (LED). This collimating lens contains two aspherical lens surfaces which can be mathematically characterized using a few designing parameters, and hence is called an analytic collimating lens. An optical ray-tracing algorithm has been developed for these analytic collimating lenses to analyze their optical performance and to optimize their designs. Six high-power and commercially available ultraviolet (UV) LEDs are chosen as examples for demonstrating the optimal collimating lens
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Zhang, Junfang, Jiawei Luo, Guowei Zhang, Bai Qin, Xiumei Ren, and Huaijin Guan. "An Ex Vivo Study on Release, Uptake, and miRNA Profile of Exosomes in Rat Lens." Journal of Ophthalmology 2022 (April 21, 2022): 1–7. http://dx.doi.org/10.1155/2022/6706172.

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Purpose. To identify the ability of releasing and uptaking exosomes in rat lens and characterize the exosomal microRNA profile of lens-derived exosomes. Methods. The rat lenses were cultured ex vivo and the medium was collected. The exosomes were isolated from medium and measured in size and concentration by nanoflow cytometry (nFCM) and transmission electron microscopy (TEM) and verified with CD63 and TSG101 by Western blot. The miRNAs in exosomes released from lens epithelial cells (LECs) were sequenced. The plasma exosomes labeled by PKH26 were used to verify the exosomes uptake LECs, and t
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Taiyab, Aftab, Yasmine Belahlou, Vanessa Wong, et al. "Understanding the Role of Yes-Associated Protein (YAP) Signaling in the Transformation of Lens Epithelial Cells (EMT) and Fibrosis." Biomolecules 13, no. 12 (2023): 1767. http://dx.doi.org/10.3390/biom13121767.

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Fibrotic cataracts, posterior capsular opacification (PCO), and anterior subcapsular cataracts (ASC) are mainly attributed to the transforming growth factor-β (TGFβ)-induced epithelial-to-mesenchymal transition (EMT) of lens epithelial cells (LECs). Previous investigations from our laboratory have shown the novel role of non-canonical TGFβ signaling in the progression of EMT in LECs. In this study, we have identified YAP as a critical signaling molecule involved in lens fibrosis. The observed increase in nuclear YAP in capsules of human ASC patients points toward the involvement of YAP in lens
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Yoon, Min-Hwa. "Changes of Refractive Correction Value with Different Age Group: A Case for Myopia Control Lens, Single Vision Lens and Reverse Geometry Contact Lens." Journal of Korean Ophthalmic Optics Society 18, no. 1 (2013): 75–84. http://dx.doi.org/10.14479/jkoos.2013.18.1.075.

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Shen, Xinyue, Manhui Zhu, Lihua Kang, et al. "Lanosterol Synthase Pathway Alleviates Lens Opacity in Age-Related Cortical Cataract." Journal of Ophthalmology 2018 (July 11, 2018): 1–9. http://dx.doi.org/10.1155/2018/4125893.

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Purpose. Lanosterol synthase (LSS) abnormity contributes to lens opacity in rats, mice, dogs, and human congenital cataract development. This study examined whether LSS pathway has a role in different subtypes of age-related cataract (ARC). Methods. A total of 390 patients with ARC and 88 age-matched non-ARC patients were enrolled in this study. LSS expression was analyzed by western blot and enzyme-linked immunosorbent assay (ELISA). To further examine the function of LSS, we used U18666A, an LSS inhibitor in rat lens culture system. Results. In lens epithelial cells (LECs), LSS expression in
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Ruan, Xiaoting, Zhenzhen Liu, Lixia Luo, and Yizhi Liu. "The Structure of the Lens and Its Associations with the Visual Quality." BMJ Open Ophthalmology 5, no. 1 (2020): e000459. http://dx.doi.org/10.1136/bmjophth-2020-000459.

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In humans, the lens is the organ with the ability to change morphology and refractive power, designated as accommodation, to focus light from various distances and obtain clear retinal image. The accommodative ability of the lens depends on its structure and biological parameters. The lens grows throughout the life, forming specific lens sutures and a unique gradient refractive index, and possesses regenerative ability under certain circumstances. Minimally invasive lens surgery that preserves endogenous lens epithelial stem/progenitor cells (LECs) can achieve functional lens regeneration in h
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Dissertations / Theses on the topic "Lens"

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Yan, Yufeng. "Photographic Fisheye Lens Design for 35mm Format Cameras." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/613395.

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Fisheye lenses refer to ultra-wide angle lenses that have field of view equal or larger than 180 degrees. Such lenses introduce large amount of barrel distortion to capture at least the entire hemisphere in front of the lens. Fisheye lenses were initially designed for scientific use, such as cloud recording and angle measuring, and were widely used for commercial purposes later. The development of photographic fisheye lenses started in 1960s. However, the lack of detailed references on photographic fisheye lens design makes such design challenging. This thesis provides detailed introduction of
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Shepard, III Ralph Hamilton. "Metamaterial Lens Design." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/194734.

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Developments in nanotechnology and material science have produced optical materials with astonishing properties. Theory and experimentation have demonstrated that, among other properties, the law of refraction is reversed at an interface between a naturally occurring material and these so-called metamaterials. As the technology advances metamaterials have the potential to vastly impact the field of optical science.In this study we provide a foundation for future work in the area of geometric optics and lens design with metamaterials. The concept of negative refraction is extended to derive a c
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Shams-Ul-Bari, Naveed. "Isospectral orbifold lens spaces." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/23981.

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Spectral theory is the study of Mark Kac's famous question [K], "can one hear the shape of a drum?" That is, can we determine the geometrical or topological properties of a manifold by using its Laplace Spectrum? In recent years, the problem has been extended to include the study of Riemannian orbifolds within the same context. In this thesis, on the one hand, we answer Kac's question in the negative for orbifolds that are spherical space forms of dimension higher than eight. On the other hand, for the three-dimensional and four-dimensional cases, we answer Kac's question in the affirmative fo
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Yuan, Sheng. "Aberrations of Anamorphic Optical Systems." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/195267.

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A detailed study of the aberrations of anamorphic optical systems is presented. This study has been developed with a theoretical structure similar to that of rotationally symmetric optical systems (RSOS) and can be considered a generalization.A general method of deriving the monochromatic primary aberration coefficient expressions for any anamorphic system types with double plane symmetry has been provided.The complete monochromatic primary aberration coefficient expressions for cylindrical anamorphic systems, toroidal anamorphic systems and general anamorphic systems with aspheric departure h
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Wilson, Cynthia Nicole. "A Fully Customizable Anatomically Correct Model of the Crystalline Lens." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20130.

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The human eye is a complex optical system comprised of many components. The crystalline lens, an optical component with a gradient index (GRIN), is perhaps the least understood as it is situated inside the eye and as a result is difficult to characterize. Its complex nonlinear structure is not easily measured and consequently not easily modeled. Presently several models of the GRIN structure exist describing the average performance of crystalline lenses. These models, however, do not accurately describe the performance of crystalline lenses on an individual basis and a more accurate individual
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Kumar, Bharat. "The Mechanobiology of the Crystalline Lens." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587649113548924.

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Ollinger, Christoph German Josef. "A waveguide-based lens-less x-ray microscope." Doctoral thesis, [S.l.] : [s.n.], 2006. http://webdoc.sub.gwdg.de/diss/2006/ollinger.

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Sasián, José. "Joseph Petzval lens design approach." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/627184.

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Gao, Weichuan, and Jose Sasian. "Air lens vs aspheric surface: a lens design case study." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/627181.

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We discuss the behavior of air lenses in lens design. The structural aberration coefficients of a thin air lens are derived and compared with their glass thin lens counterpart. Examples are provided for a telephoto lens and the Monochromatic Quartet where air lenses or aspheric surfaces are used.
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DePianto, Daryle Joseph. "Studies on lens fiber cell gene expression & lens differentiation /." Connect to Digital dissertations. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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Books on the topic "Lens"

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Leclercq, Gérard. Lens. A. Sutton, 2008.

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Laikin, Milton. Lens design. 2nd ed. Marcel Dekker, Inc., 1995.

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Laikin, Milton. Lens design. 2nd ed. Marcel Dekker, Inc, 1995.

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Laikin, Milton. Lens design. M. Dekker, 1991.

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Sargeant, Jack. Naked lens. Creation Books, 1997.

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Hammond, Corydon D. Lens. Routledge, 2013. http://dx.doi.org/10.4324/9780203823705.

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Kruszka, Oliver. Lens. Independently Published, 2019.

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Jordan, Steven Lyle. Lens. Independently Published, 2018.

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Scott, Kevin Paul. Lens. Baxter Press, 2019.

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PICTET, Shields PRIX. Female Lens Hb: Female Lens. Antique Collectors' Club, 2022.

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Book chapters on the topic "Lens"

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Hanks, Laura Hourston. "Louvre-Lens, Lens, France." In New Museum Design. Routledge, 2021. http://dx.doi.org/10.4324/9780429435591-7.

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Yu, Johan. "Lens." In Getting Started with Salesforce Einstein Analytics. Apress, 2019. http://dx.doi.org/10.1007/978-1-4842-5200-0_5.

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Krieglstein, Günter K., Christian P. Jonescu-Cuypers, Maria Severin, and Michael A. Vobig. "Lens." In Atlas of Ophthalmology. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-57132-9_6.

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Stefani, Fritz H., and Gerhard Hasenfratz. "Lens." In Macroscopic Ocular Pathology. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-71796-3_8.

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Lee, W. R. "Lens." In Ophthalmic Histopathology. Springer London, 1993. http://dx.doi.org/10.1007/978-1-4471-3843-3_14.

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Lee, William R. "Lens." In Ophthalmic Histopathology. Springer London, 2002. http://dx.doi.org/10.1007/978-1-4471-3910-2_14.

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Naumann, G. O. H. "Lens." In Pathology of the Eye. Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4613-8525-7_9.

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Berman, Elaine R. "Lens." In Biochemistry of the Eye. Springer US, 1991. http://dx.doi.org/10.1007/978-1-4757-9441-0_5.

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Roberts, Fiona, and Chee Koon Thum. "Lens." In Lee's Ophthalmic Histopathology. Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-2476-4_14.

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Nita, Stefania Loredana, and Marius Mihailescu. "Lens." In Haskell Quick Syntax Reference. Apress, 2019. http://dx.doi.org/10.1007/978-1-4842-4507-1_20.

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Conference papers on the topic "Lens"

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Ueda, Naoki, Masaru Sasago, Akio Misaka, Hisao Kikuta, Hiroaki Kawata, and Yoshihiko Hirai. "Built-in lens mask lithography: challenge for high definition lens-less lithography." In Photomask Japan 2014, edited by Kokoro Kato. SPIE, 2014. http://dx.doi.org/10.1117/12.2065251.

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Chaves, Julio, Juan C. Minano, and Pablo Benitez. "Afocal video-pixel lens for tricolor LEDs." In Optics & Photonics 2005, edited by Roland Winston and R. John Koshel. SPIE, 2005. http://dx.doi.org/10.1117/12.620148.

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Ju, Xi, Hongwei Zhang, Wenjie Zeng, et al. "LENS." In the 6th ACM international workshop. ACM Press, 2011. http://dx.doi.org/10.1145/2030718.2030727.

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Zhao, Jinwei, and Jianping Pan. "LENS." In MMSys '24: ACM Multimedia Systems Conference 2024. ACM, 2024. http://dx.doi.org/10.1145/3625468.3652170.

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Courtial, Johannes, Tomáš Tyc, Jakub Bělín, Stephen Oxburgh, Euan Cowie, and Chris D. White. "Ideal-lens cloak and omnidirectional lens." In Frontiers in Optics. OSA, 2017. http://dx.doi.org/10.1364/fio.2017.jtu2a.45.

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Clark, Peter P. "1985 International Lens Design Conference Lens Design Problem: A Reversible Lens." In 1985 International Lens Design Conference, edited by Duncan T. Moore and William H. Taylor. SPIE, 1986. http://dx.doi.org/10.1117/12.949260.

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Schelkanova, I., A. Pandya, G. Macdonald, D. Shah, L. Lilge, and A. Douplik. "Microvascular Patterns Monitoring Via Lens Less CMOS Chip." In Biomedical Optics. OSA, 2014. http://dx.doi.org/10.1364/biomed.2014.bs3a.48.

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Murata, Osamu, Hiroyuki Toge, and Kunihiro Sato. "Lens-less holographic microscope with large visual depth." In SPIE OPTO: Integrated Optoelectronic Devices, edited by Hans I. Bjelkhagen and Raymond K. Kostuk. SPIE, 2009. http://dx.doi.org/10.1117/12.808766.

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Fatemi, Reza, Behrooz Abiri, and Ali Hajimiri. "An 8×8 Heterodyne Lens-less OPA Camera." In CLEO: Applications and Technology. OSA, 2017. http://dx.doi.org/10.1364/cleo_at.2017.jw2a.9.

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Wagner, Omer, Aditya Pandya, Yoav Chemla, et al. "Lens-less Micro-endoscopy through highly scattering media." In CLEO: Applications and Technology. OSA, 2018. http://dx.doi.org/10.1364/cleo_at.2018.jtu2a.107.

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Reports on the topic "Lens"

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Krider, J. Lithium Lens Interlocks. Office of Scientific and Technical Information (OSTI), 1985. http://dx.doi.org/10.2172/948901.

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Primas, Lori Ellen. SQS Fiber Lens Array. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1482901.

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Mallett, Michael Wesley. Lens of Eye Dosimetry. Office of Scientific and Technical Information (OSTI), 2015. http://dx.doi.org/10.2172/1209275.

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Birge, Noah Watson, and Verena Geppert-Kleinrath. MixIT LDRD Lens Design. Office of Scientific and Technical Information (OSTI), 2020. http://dx.doi.org/10.2172/1633554.

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Morgan, J. High Gradient Lithium Lens. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/1973966.

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Asrullah, Muhammad, Ken Dwiba Amarakamini, and Nida Adzilah Auliani. Voice through the lens. Wageningen University & Research, 2024. https://doi.org/10.18174/679836.

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Xue, Liang, and Vincent Fusco. Electronically Reconfigurable Microwave Lens Antennas. Defense Technical Information Center, 2005. http://dx.doi.org/10.21236/ada445588.

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Marshall, P. The SNAP Strong Lens Survey. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/839722.

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Seryi, Andrei. Tevatron Electron Lens Magnetic System. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/798884.

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Andresky, Nikolai L. HAMAS through a Constructivist Lens. Defense Technical Information Center, 2008. http://dx.doi.org/10.21236/ada510054.

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