Results 51 to 60 of about 3,348,847 (387)
Advanced Engineering Materials, EarlyView.A multimaterial approach is introduced to improve upon auxetic structures by combining two different polymers into the same reentrant honeycomb structure via additive manufacturing. The deformation behavior as well as the resulting Poisson's ratio are thereby improved significantly.
Alexander Engel +2 more
wiley +1 more source
Profile and Visual Outcome of Patients having Keratoconus Attending Tertiary Eye Hospital, Nepal
Journal of Nobel Medical CollegeBackground: Keratoconus is a bilateral, asymmetric, chronic, progressive ectasia of the cornea in which patients experience distorted vision that is usually treated with rigid contact lenses when spectacles no longer provide adequate vision.
Pankaj Ray Adhikari +2 more
doaj +1 more source
Türk Oftalmoloji Dergisi, 2023 Objectives:Microbial keratitis can cause significant visual morbidity and is a common reason for presentation to eye casualty clinics. Contact lens wear and poor contact lens hygiene significantly increase the risk of corneal infection.
Michael Tsatsos +5 more
doaj +1 more source
Stress concentration in periodically rough hertzian contact: Hertz to soft-flat-punch transition
, 2016 We report on the elastic contact between a spherical lens and a patterned substrate, composed of an hexagonal lattice of cylindrical pillars. The stress field and the size of the contact area are obtained by means of numerical methods (discrete Green's ...
Ledesma-Alonso, Rene +4 more
core +1 more source
A medieval fallacy: the crystalline lens in the center of the eye. [PDF]
, 2016 ObjectiveTo determine whether, as most modern historians have written, ancient Greco-Roman authors believed the crystalline lens is positioned in the center of the eye.BackgroundHistorians have written that statements about cataract couching by Celsus ...
Hadi, Tamer M +4 more
core +1 more source
Advanced Engineering Materials, EarlyView.This article investigates residual stress formation during single‐spot nanosecond laser ablation of stainless steel. Experimental validation and a parametric study using finite element simulations are employed to analyze thermal effects, ablation dynamics, and stress evolution.
Yutaka Tsumura +7 more
wiley +1 more source
Ocular higher-order aberrations and axial eye growth in young Hong Kong children
Scientific Reports, 2018 This retrospective longitudinal analysis aimed to investigate the association between ocular higher-order aberrations (HOAs) and axial eye growth in Hong Kong children.
Jason K. Lau +4 more
doaj +1 more source
IJRETINA (International Journal of Retina), 2021 Introduction: Impaired blood flow is an early sign of retinal dysfunction in diabetes. Impaired blood flow of the radial peripapillary capillaries can affect the Retinal Nerve Fiber Layer (RNFL) or ganglion cell function.
Sindi Dwijayanti +5 more
doaj +1 more source
Fabrication of Miniaturized Variable-focus Lens Using Liquid Filling Technique [PDF]
, 2007 This paper describes a simple method for fabricating a variable-focus lens by using PDMS (polydimethylsiloxane) and filling with liquid for the variable-focus lens. The lens diameter of 2-mm was designed in this experiment and expected to reach the focal
Yang, Chung-Yao +2 more
core +2 more sources
Advanced Engineering Materials, EarlyView.Picosecond direct laser interference patterning (DLIP) enables precise microstructure fabrication on stainless steel. Using a multiscan approach, high‐aspect‐ratio patterns are achieved. Fluence influences structure growth and homogeneity, with smaller periods yielding better uniformity.
Fabian Ränke +5 more
wiley +1 more source