Results 41 to 50 of about 110,606 (256)
Results in PhysicsOptical systems are widely used in aerospace, life sciences, civil livelihood and other fields. The lens is one of the most common components in optical systems, and its centre thickness is an important parameter in material characterization and ...
Haojie Zhang +5 more
doaj +1 more source
Ocular biometric parameter characteristics and influence on refractive power in Chinese children [PDF]
International Journal of OphthalmologyAIM: To analyze ocular parameters and refractive status in children aged 3-12y and to explore differences in these parameters across age groups with identical refractive status for studying refractive progression.
Chao-Ying Ye +5 more
doaj +1 more source
Corneal epithelial and stromal thickness changes in myopic orthokeratology and their relationship with refractive change. [PDF]
PLoS ONE, 2018 PURPOSE:To investigate topographic changes in corneal epithelial thickness (CET) and stromal thickness following orthokeratology (OK) and to determine associated factors affecting refractive changes.
Wook Kyum Kim +4 more
doaj +1 more source
Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading
Advanced Engineering Materials, EarlyView.This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev +2 more
wiley +1 more source
Laser‐Induced Graphene from Waste Almond Shells
Advanced Functional Materials, EarlyView.Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova +9 more
wiley +1 more source
The time course and nature of corneal oedema during sealed miniscleral contact lens wear
, 2019 Purpose To examine the magnitude and time course of central epithelial, stromal and total corneal thickness changes during sealed miniscleral contact lens wear and the influence of initial central corneal clearance upon these thickness changes ...
Collins, Michael +7 more
core +1 more source
Comparison of choroidal thickness and lens thickness among subtypes of angle-closure disease
The Pan-American Journal of OphthalmologyPurpose: The purpose of the study was to evaluate choroidal thickness and lens thickness among various subtypes of angle-closure disease and compare it with healthy controls.
Sai Lakshmi Suvarna Yeluguri +4 more
doaj +1 more source
Unusual optical coherence tomography and fundus autofluorescence findings of eclipse retinopathy
Indian Journal of Ophthalmology, 2012 A 63-year-old female patient complained of dimness in the central field of vision in the left eye after viewing an annular partial eclipse without adequate eye protection on 22 July 2009. Fundoscopy showed a wrinkled macular surface.
Kun-Hsien Li +3 more
doaj +1 more source
Profile thickness synthesis of thin-film waveguide Luneburg lens
Discrete and Continuous Models and Applied Computational Science, 2022 In the work the link between the focusing inhomogeneity of the effective refractive index of waveguide Luneburg lens and the irregularity of the waveguide layer thickness generating this inhomogeneity is demonstrated.
Konstantin P. Lovetskiy +2 more
doaj +1 more source
Receptor‐Free Identification of Toxic Gases Enabled by Hygroscopic Aqueous Salt Films
Advanced Functional Materials, EarlyView.Water as a gas sensor coating sounds impossible—until it stops evaporating. Here, hygroscopic salt solutions (LiCl, LiBr, H3PO4) form non‐drying aqueous films on CNT chemiresistors under ambient air. Gases partition into these liquid layers, sometimes transforming into water, and generate salt‐specific resistance fingerprints across a four‐channel ...
Seongwoo Lee +5 more
wiley +1 more source