Results 51 to 60 of about 88,327 (313)

Corneal Astigmatism Measurements Comparison among Ray-Tracing Aberrometry, Partial Coherence Interferometry, and Scheimpflug Imaging System

Journal of Ophthalmology, 2020
Purpose. To investigate interdevice agreement among corneal topography/ray-tracing aberrometry (iTrace), partial coherence interferometry (IOLMaster), and Scheimpflug imaging (Pentacam) for the measurement of corneal astigmatism. Methods.
Yaqin Zhang, Jing Dong, Suhua Zhang, Bin Sun, Xiaoliang Wang, Maolong Tang, Xiaogang Wang   +6 more
doaj   +1 more source

Field Scanner Design for MUSTANG of the Green Bank Telescope

, 2011
MUSTANG is a bolometer camera for the Green Bank Telescope (GBT) working at a frequency of 90 GHz. The detector has a field of view of 40 arcseconds.
Brian Mason, C. Dragone, J. Cheng, J. Q. Cheng, JingQuan Cheng, L. Noethe, P. R. Jewell, R. N. Wilson, R. Norrod, R. Norrod, S. Chang, S. Chang, W. V. T. Rusch, XinNan Li, Y. Mizugutch, Yang Li   +15 more
core   +1 more source

ASTIGMATISM AND " EYESTRAIN." [PDF]

The Lancet, 1904
n ...
openaire   +3 more sources

Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population

Clinical Ophthalmology, 2020
Mohamed Hosny, Alaa Badawy, Lobna Khazbak, Mohamed Anis, Sarah Azzam Ophthalmology, Cairo University, Giza, EgyptCorrespondence: Mohamed HosnyOphthalmology, Cairo University, 84 Shehab Street, Mohandeseen, Giza 12411, EgyptTel +20 1000007675Email ...
Hosny M, Badawy A, Khazbak L, Anis M, Azzam S   +4 more
doaj  

Proto-Model of an Infrared Wide-Field Off-Axis Telescope [PDF]

, 2010
We develop a proto-model of an off-axis reflective telescope for infrared wide-field observations based on the design of Schwarzschild-Chang type telescope.
Chang, Seunghyuk, Kim, Geon Hee, Kim, Myung Sang, Kim, Sanghyuk, Lee, Hanshin, Lee, Sungho, Pak, Soojong, Yang, Sun Choel   +7 more
core   +1 more source

On Astigmatic Aberration [PDF]

Proceedings of the Physical Society of London, 1902
n ...
openaire   +3 more sources

Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic Astigmatism

Journal of Ophthalmology, 2015
Purpose. To assess the amount and the axis orientation of anterior and posterior corneal astigmatism after refractive lenticule extraction (ReLEx) for myopic astigmatism. Methods. We retrospectively examined 53 eyes of 53 consecutive patients (mean age ±
Kazutaka Kamiya, Kimiya Shimizu, Mayumi Yamagishi, Akihito Igarashi, Hidenaga Kobashi   +4 more
doaj   +1 more source

Long-term outcomes of cataract surgery with toric intraocular lens implantation by the type of preoperative astigmatism

Scientific Reports, 2022
Surgical outcomes of toric intraocular lens (IOL) implantation for 8 years after surgery were analyzed. Data were retrospectively collected in 176 eyes of 176 patients before and 1 month, 1, 3, 5, and 8 years after phacoemulsification and implantation of
Tetsuro Oshika, Shinichiro Nakano, Yoshifumi Fujita, Yuya Nomura, Yasushi Inoue, Hiroyasu Takehara, Kazunori Miyata, Masato Honbou, Toru Sugita, Tsutomu Kaneko   +9 more
doaj   +1 more source

Age- and gender-related characteristics of astigmatism in a myopic population

Frontiers in Medicine, 2022
PurposeTo explore age- and gender-related differences of refractive and corneal astigmatism in myopic patients looking for refractive surgery.DesignA retrospective cross-sectional study.Materials and methodsThe medical files of candidates looking for ...
Shan Yang, Yang Jiang, Ge Cui, Ying Li
doaj   +1 more source

Nonlocal conservation laws of the constant astigmatism equation

, 2016
For the constant astigmatism equation, we construct a system of nonlocal conservation laws (an abelian covering) closed under the reciprocal transformations.
Hlaváč, Adam, Marvan, Michal
core   +1 more source