نتایج جستجو برای: plastic lens

تعداد نتایج: 105212  

Journal: :Archives of ophthalmology 2006
Mohan N Iyer Dennis P Han

A cost-effective, reusable practice eye model for epiretinal membrane peeling that uses easily obtained, commercially available materials was developed. A commercially available globe that is anatomically and optically similar to the human eye was modified by creating 2 ports that simulate superior sclerotomies. The model has a removable plastic anterior segment, which allows access to the post...

Journal: :IJMMME 2011
Ashfaq Khan Zengbo Wang Mohammad A. Sheikh Lin Li

Laser surface patterning by Contact Particles Lens Arrays (CPLA) has been widely utilized for patterning of smooth surfaces but there is no technique developed by which CPLA can be deposited on a rough surface. For deposition of CPLA, conventional techniques require the surface to be flat, smooth and hydrophilic. In this study, a new method for the deposition of CPLA on a rough surface is propo...

Journal: :Applied optics 1996
G Y Yoon T Jitsuno M Nakatsuka S Nakai

A new plastic microlens array, consisting of 900 lenslets, has been developed for the Shack Hartmann wave-front sensor.The individual lens is 300 µm × 300µm and has a focal length of 10 mm, which provides the same focal size, 60 µm in diameter, with a constant peak intensity. One can improve thewave-front measurement accuracy by reducing the spot centroiding error by averaging a few frame memor...

2010
Z. W. Zhong M. H. Leong X. D. Liu

0261-3069/$ see front matter 2010 Elsevier Ltd. A doi:10.1016/j.matdes.2010.08.008 ⇑ Corresponding author. Address: School of Mechan ing, Nanyang Technological University, 50 Nanyang Republic of Singapore. Tel.: +65 6790 5588; fax: +65 E-mail address: [email protected] (Z.W. Zhon In this study, a rapidly solidified aluminum alloy was compared with beryllium copper and 6061 aluminum alloys in ...

Journal: :The Journal of Biophysical and Biochemical Cytology 1959
Mary Ann Gavin Bolivar J. Lloyd

The use of glass knives in cutting sections for electron microscopy has been a standard procedure for several years. During this period various modifications in methods of scoring and breaking knives have been recommended, as well as types of glass which can be used (1, 2). Knives of high silica content glass were first suggested by Eaves and Flewett (1953) who reported that such knives retaine...

2013
Kavit Amin Victoria Teoh Barbara Jemec

Microsurgical training is fundamental to training in plastic and reconstructive surgery. Innovative methods are required that are simple, accessible and cheap to replicate intraoperative experience as well as enable practice in this technically demanding activity. Prior to embarking on loupes-only microsurgery, it has been suggested that intensive training under the microscope is essential.1 Th...

2010
Peng He Fei Wang Likai Li Kyriakos Georgiadis Fritz Klocke Allen Y. Yi

INTRODUCTION Refractive and diffractive hybrid lenses have been designed and implemented for some industrial applications. These optical elements however are limited to low volume production or specific materials such as polymers. Although plastic lenses can be fabricated using injection molding into different geometries at high volume, these optics do not perform well under rigorous conditions...

Journal: :Investigative ophthalmology & visual science 1983
S R Ledbetter D L Hatchell W J O'Brien

Secondary aqueous humor (2 degrees AH) is known to contain elevated levels of serum macromolecules and has been shown to stimulate the proliferation of lens epithelial cells both in vivo and in vitro as well as corneal endothelial cells in vitro. The purpose of this study was to characterize the response of bovine corneal endothelial cells to 2 degrees AH from rabbits and to compare the effect ...

2017
Sandhya Pandey Ravi Kumar Chittoria Devi Prasad Mohapatra M. T. Friji Dinesh Kumar Sivakumar

How to cite this article: Gupta A, Gupta S, Kumar A, Jha MK, Bhattacharaya S, Tiwari VK. Novel use of preputial flap. Indian J Plast Surg 2017;50:112-4. This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credite...

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