Results 21 to 30 of about 10,727 (157)

Comparison of Toric and Spherical Orthokeratology Lenses in Patients with Astigmatism

open access: yesJournal of Ophthalmology, 2019
Purpose. This retrospective study aimed at comparing the efficacy and safety of toric and spherical orthokeratology lenses in the treatment of patients with moderate to high astigmatism. Methods.
Jun Jiang   +5 more
doaj   +1 more source

Unquenched flavor and tropical geometry in strongly coupled Chern-Simons-matter theories [PDF]

open access: yes, 2011
We study various aspects of the matrix models calculating free energies and Wilson loop observables in supersymmetric Chern-Simons-matter theories on the three-sphere.
A Kapustin   +38 more
core   +2 more sources

Corneal biomechanical changes following toric soft contact lens wear

open access: yesJournal of Ophthalmic & Vision Research, 2016
Purpose: To determine the effect of using toric soft contact lenses on corneal biomechanical properties. Methods: We enrolled 33 healthy patients with mean age of 23.18 ± 4.06 and minimal cylinder power of 1 D (-1.98 ± 0.808 SD) and negative history of ...
Somayeh Radaie-Moghadam   +4 more
doaj   +1 more source

Bubbling Calabi-Yau geometry from matrix models

open access: yes, 2008
We study bubbling geometry in topological string theory. Specifically, we analyse Chern-Simons theory on both the 3-sphere and lens spaces in the presence of a Wilson loop insertion of an arbitrary representation.
C. Beasley   +23 more
core   +1 more source

Refractive lens exchange using SN60T5 AcrySof Toric intraocular lens in stage 2 keratoconus

open access: yesRevista Brasileira de Oftalmologia, 2011
This is a case report of a 45-year-old anisometropic woman with stage 2 keratoconus submitted to refractive lens exchange employing SN60T5 AcrySof Toric intraocluar lens on her left eye.
Giuliano de Oliveira Freitas   +2 more
doaj   +1 more source

Black Holes, Instanton Counting on Toric Singularities and q-Deformed Two-Dimensional Yang-Mills Theory

open access: yes, 2006
We study the relationship between instanton counting in N=4 Yang-Mills theory on a generic four-dimensional toric orbifold and the semi-classical expansion of q-deformed Yang-Mills theory on the blowups of the minimal resolution of the orbifold ...
Aganagic   +57 more
core   +2 more sources

New N=1 dualities from orientifold transitions - Part II: String Theory [PDF]

open access: yes, 2013
We present a string theoretical description, given in terms of branes and orientifolds wrapping vanishing cycles, of the dual pairs of gauge theories analyzed in 1210.7799.
García-Etxebarria, Iñaki   +2 more
core   +2 more sources

Beta-ensembles for toric orbifold partition function

open access: yes, 2011
We investigate combinatorics of the instanton partition function for the generic four dimensional toric orbifolds. It is shown that the orbifold projection can be implemented by taking the inhomogeneous root of unity limit of the q-deformed partition ...
Kimura, Taro
core   +1 more source

Constructions in Sasakian Geometry

open access: yes, 2007
We describe various constructions in Sasakian geometry. First we generalize the join construction of the first two authors to arbitrary Sasakian manifolds.
Boyer, Charles P.   +2 more
core   +2 more sources

Clinical examples of correct orientation of a toric intraocular lens in patients with postkeratotomic corneal ectasia [PDF]

open access: yesКлиническая практика
BACKGROUND: Surgical treatment of cataract in patients with postkeratotomic corneal ectasia has various features. First, difficulties arise when calculating the optical strength of an intraocular lens and its cylindrical component and determining the ...
Igor V. Kuznetsov, Natalia V. Pasikova
doaj   +1 more source

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