Results 41 to 50 of about 24,715 (172)
Phakic Intraocular Lenses An Overview
Delhi Journal of Ophthalmology, 2013 Currently, there are four general approaches to correct refractive errors: refractive corneal surgery, crystalline lens surgery, and implantation of an intraocular lens (IOL) in the anterior or posterior chamber.
Sana Ilyas Tinwala, J S Titiyal
doaj +1 more source
X-ray Free Electron Laser based Dark-Field X-ray Microscopy [PDF]
arXiv, 2021 Dark-field X-ray microscopy (DFXM) is a nondestructive full-field imaging technique providing three dimensional mapping of microstructure and local strain fields in deeply embedded crystalline elements. This is achieved by placing an objective lens in the diffracted beam, giving a magnified projection image.
arxiv
Multi‐Scaled Cellulosic Nanonetworks from Tunicates
Advanced Functional Materials, EarlyView.Microbial and plant nanonetworks of cellulose have enabled a wide range of high‐performance yet sustainable materials. Herein, a third class of cellulosic nanonetworks is showcased by exploiting the only animal tissue‐producing cellulose nanofibers, i.e., ascidians. An ultrastructure including spherical cells and a microvasculature with diameters of 50–
Mano Govindharaj +10 more
wiley +1 more source
Curvature-Controlled Geometrical Lensing Behavior in Self-Propelled Colloidal Particle Systems [PDF]
arXiv, 2022 In many biological systems, the curvature of the surfaces cells live on influence their collective properties. Curvature should likewise influence the behavior of active colloidal particles. We show using molecular simulation of self-propelled active particles on surfaces of Gaussian curvature (both positive and negative) that curvature sign and ...
arxiv
Identification of Bright Lenses from the Astrometric Observations of Gravitational Microlensing Events [PDF]
CNU-A&SS-05/99, 1999 When a source star is gravitationally microlensed by a dark lens, the centroid of the source star image is displaced relative to the position of the unlensed source star with an elliptical trajectory. Recently, routine astrometric follow-up measurements of these source star image centroid shifts by using high precision interferometers are proposed to ...
arxiv +1 more source
Advanced Functional Materials, EarlyView.The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal +10 more
wiley +1 more source
Revista Electrónica Dr. Zoilo E. Marinello Vidaurreta, 2017 Background: cataract is the most frequent cause of preventable blindness in the municipality of Puerto Padre and in the country. Its treatment is surgical.Objective: to characterize the clinical and epidemiological variables in patients operated on for ...
Juan Carlos Góngora Torres +4 more
doaj
Pigment dispersion syndrome associated with spontaneous subluxation of crystalline lens
Oman Journal of Ophthalmology, 2017 Pigment dispersion syndrome (PDS) is an ocular condition characterized by a dispersion of iris pigment throughout the eye. This pigment is deposited in a characteristic manner on the corneal endothelium as Krukenberg's spindle, anterior surface of the ...
Vikas Veerwal +3 more
doaj +1 more source
Multiple methods of surgical treatment combined with primary IOL implantation on traumatic lens subluxation/dislocation in patients with secondary glaucoma [PDF]
International Journal of Ophthalmology, 2014 AIM:To describe clinical findings and complications from cases of traumatic lens subluxation/dislocation in patients with secondary glaucoma, and discuss the multiple treating methods of operation combined with primary intraocular lens (IOL) implantation.
Rui Wang +5 more
doaj +1 more source
Atomic Representations of Local and Global Chemistry in Complex Alloys [PDF]
arXiv, 2023 The exceptional properties observed in complex concentrated alloys (CCAs) arise from the interplay between crystalline order and chemical disorder at the atomic scale, complicating a unique determination of properties. In contrast to conventional alloys, CCA properties emerge as distributions due to varying local chemical environments and the specific ...
arxiv