Results 101 to 110 of about 88,327 (313)
Acta Crystallographica Section C, Volume 81, Issue 7, Page 376-390, July 2025.With an increasing number of refined MicroED structures available to the community, lessons can be learned of their profiles and quality, as well as of best practices.As the electron diffraction technique MicroED gains momentum and is increasingly embraced by researchers in both academia and industry, we have the opportunity to familiarize ourselves ...
Johan Unge +3 more
wiley +1 more source
Astigmatism in candidates of Cataract surgery and its relationship with corneal optical power, axial length, sex and patient age [PDF]
Acta Medica Iranica, 2000 This study was conducted to define the prevalence and types of corneal astigmatism in relation with corneal optical power, axial length, sex and patient age. 641 cataract patients were included in a descriptive study.
Siatiri H
doaj
Acta Ophthalmologica, EarlyView.Abstract Purpose To evaluate the effectiveness of 12 months of spectacle lens wear incorporating cylindrical annular refractive elements (CARE) in slowing myopia progression compared to single vision (SV) spectacle wear. Methods In an ongoing 2‐year prospective, double‐masked, multi‐centre clinical trial, 240 Chinese children aged 6–13 years, spherical
Xiaoqin Chen +10 more
wiley +1 more source
Geometric phases in astigmatic optical modes of arbitrary order
, 2013 The transverse spatial structure of a paraxial beam of light is fully characterized by a set of parameters that vary only slowly under free propagation. They specify bosonic ladder operators that connect modes of different order, in analogy to the ladder
Gerard Nienhuis +3 more
core +1 more source
Acta Ophthalmologica, EarlyView.Abstract Purpose To investigate 2‐year changes in macular choroidal thickness (ChT) in children receiving 0.01% atropine eyedrops and its relationship with spherical equivalent refraction (SER) progression and axial length (AL) elongation. Methods A total of 250 myopic children aged 6–16 years (167%–0.01% atropine, 83‐placebo) were enrolled in the ...
Emmanuel Kobia‐Acquah +3 more
wiley +1 more source
Multivariate Regression Analysis to Predict Postoperative Refractive Astigmatism in Cataract Surgery
Journal of Ophthalmology, 2020 Purpose. To assess the correlation between postoperative refractive astigmatism and preoperative parameters in cataract surgery. Methods. Left eyes of 100 consecutive patients scheduled for cataract surgery with a 2.4 mm clear corneal incision were ...
Atsushi Kawahara +2 more
doaj +1 more source
Human Genetics, 2018 Previous studies have suggested that naturally occurring genetic variation contributes to the risk of astigmatism. The purpose of this investigation was to identify genetic markers associated with corneal and refractive astigmatism in a large-scale ...
Rupal L. Shah, J. Guggenheim
semanticscholar +1 more source
Acta Ophthalmologica, EarlyView.Abstract Objective To evaluate the effects of customized corneal collagen cross‐linking (CXL) on higher‐order aberrations (HOAs) in keratoconus (KC): vertical coma (VC), horizontal coma (HC), spherical aberration (SA), trefoil (TF) and astigmatism, compared with the same effects in healthy eyes undergoing CXL for low‐grade myopia.
Jad Hayek +4 more
wiley +1 more source
Physiology of Astigmatism [PDF]
, 2012 We know that the expression emmetropia is a conventional one and that in fact all normal human eyes have mild degrees of spherocylindrical errors (Shilo, 1997) or consist of a bitoric optical system, i.e. have principal meridians of relatively higher and lower powers at right angles. It is generally accepted that genetic factors have a significant role
Seyed-Farzad Mohammadi +2 more
openaire +3 more sources
Acta Ophthalmologica, EarlyView.Abstract Purpose To investigate the long‐term effects and dynamic changes in scleral thickness above the T‐haptic after sutureless scleral‐fixated intraocular lens (sSFIOL) implantation using the FIL‐SFF Carlevale lens. Setting Single‐centre, single‐surgeon, prospective clinical trial, Department of Ophthalmology, Medical University of Vienna, Austria.
Markus Schranz +5 more
wiley +1 more source