Results 51 to 60 of about 23,319,759 (233)

Effect of Soft Contact Lens Wear on Tear Film Break up Time

Pakistan Journal of Ophthalmology, 2020
Purpose:  To see the effect of soft contact lens wears on tear breakup time. Study Design:  Descriptive Observational study. Place and Duration of Study:  College of Ophthalmology and Allied Vision Sciences, King Edward Medical University, Mayo Hospital, Lahore.
Syeda Rushda Zaidi, Mohammad Ali A Sadiq, Shua Azam, Uzma Sattar, Samia Iqbal, Huma Ejaz   +5 more
openaire   +1 more source

Intracrystalline Void‐Mediated Toughening of Brittle Crystals in Quail Eggshells

Advanced Functional Materials, EarlyView.
In quail eggshells, the high density and disordered arrangement of intracrystalline voids inhibit lattice cleavage, suppress long‐range crack propagation, and promote deformation twinning and quasi‐plasticity, serving as an essential toughening motif. We show that these voids remain within a narrow subcritical size range and therefore predominantly do ...
Jingxiao Zhong, Qihang Wang, Andre E. Vellwock, Sinuhe Perea Puente, Tingting Zhu, Jia Hui Lim, Kadda Medjoubi, Sebastian Hoerl, Erika Griesshaber, Wolfgang W. Schmahl, Yannicke Dauphin, Emeline Raguin, Peter Werner, Francesco Stellacci, Michael V. Swain, Peter Fratzl, Shahrouz Amini   +16 more
wiley   +1 more source

A Simplified Xeroscope for the Noninvasive Measurement of Tear Break-up Time

Philippine Journal of Ophthalmology, 2015
Objective: To develop and validate a noninvasive method for measuring tear break-up time (NIBUT) using readily available materials and comparing it to the standard fluorescein tear break-up time (TBUT) assessment.
Darien B. Gaw, MD, Bernard Gil O. Tinio, MD   +1 more
doaj  

Tear film stability : a review

, 2013
Tear film stability can be assessed via a number of tools designed for clinical as well as research purposes. These techniques can give us insights into the tear film, and allow assessment of conditions that can lead to dry eye symptoms, and in severe ...
Raju, Shiwani R. (S25065), Sweeney, Deborah F. (R16275), Millar, Thomas (R8217)   +2 more
core   +1 more source

Neuromorphic Devices for Extreme Environments: State‐Variable Reliability and Stabilization Strategies

Advanced Functional Materials, EarlyView.
Neuromorphic devices for extreme environments are interpreted through the physical states that store and process information. Radiation, temperature extremes, and vacuum can perturb vacancies, filaments, trapped charges, polarization, interfaces, and readout signals.
Taehyun Park, Geon Park, Junhyung Cho, Jaechan Song, Wangmyung Choi, Jaehyun Hur, Nicola Gasparini, Hocheon Yoo   +7 more
wiley   +1 more source

The influence of blood glucose level on tear break up time among young adults with diabetes [PDF]

, 2018
Background: It has been reported that diabetics are more likely to develop tear film dysfunction compared to non-diabetics. Even so, there has been very little research reported on the correlation between blood glucose level and quality of tears ...
Che Azemin, Mohd Zulfaezal, Badarudin, Noor Ezailina, Hamirudin, Aliza Haslinda, Rahman, Aziimah, Mat Noh, Nor Ain   +4 more
core   +1 more source

The Effect of Prolactinoma on Tear Film Function

, 2022
Objectives:To compare dry eye parameters in prolactinoma patients and healthy controls and evaluate their correlation with prolactin (PRL) levels and the duration of hyperprolactinemia.Materials and Methods:Consecutive patients with prolactinoma and ...
Cezmi Doğan, Özer Açbay, Burak Mergen, Güzin İskeleli, Ümit Yaşar Güleser, Oğuzhan Kılıçarslan, İskeleli, Güzin, Açbay, Özer, Kılıçarslan, Oğuzhan, Mergen, Burak, Güleser, Ümit Yaşar, Doğan, CEZMİ   +11 more
core   +1 more source

Bistable Isochoric Chiral Metamaterials with Reprogrammable Multiaxial Responses

Advanced Functional Materials, EarlyView.
An isochoric bistable rotational unit cell enables in situ modification of internal contact conditions post‐fabrication, without altering the global envelope dimensions of the surrounding architecture. By selectively switching between open and closed states, the tessellated chiral metamaterial can reprogram its volumetric response, including bulk ...
Shujia Chen, Lei Wu, Jingran Liu, Damiano Pasini   +3 more
wiley   +1 more source

Ultra‐Thin Tow‐Based Discontinuous Composites—Material Overview and Aspirations

Advanced Functional Materials, EarlyView.
Tow‐based discontinuous composites made from ultra‐thin tapes offer outstanding in‐plane mechanical properties. This material, inspired by Nacre, has high volume fraction of tapes exceeding 90 % and allows for quasi‐isotropic material plates less than 100 micrometer in thickness.
Ioannis Katsivalis, Vasiliki Safranoglou, Luis Gulfo, Michael R. Wisnom, Martin Fagerström, Malin Åkermo, Soraia Pimenta, Dan Zenkert, Leif E. Asp   +8 more
wiley   +1 more source

Hydrogel‐Based Method for High‐Resolution Measurements of Contact Mechanics in Rapid Biological Adhesives: A Case Study in Cuttlefish Tentacle Strikes

Advanced Functional Materials, EarlyView.
Cuttlefish and squid can catch their prey within milliseconds using specialized tentacles and suckers. The physics of how the suckers can attach so quickly has remained a mystery given the technical challenges of studying them in vivo. In this publication, we develop a hydrogel that retains imprints of the suckers in order to estimate the forces they ...
Alexander Koehnsen, Mila F Krikke, Thomas E Kodger, Florian T Muijres, Guillermo J Amador   +4 more
wiley   +1 more source