Results 91 to 100 of about 470 (166)

The photorefractive characteristics of bismuth-oxide doped lithium niobate crystals

AIP Advances, 2015
Bismuth-doped lithium niobate (LN:Bi) crystals were grown by Czochralski method and their optical damage resistance, photorefraction, absorption spectra, and defect energy levels were investigated.
Dahuai Zheng, Yongfa Kong, Shiguo Liu, Jiaying Yao, Ling Zhang, Shaolin Chen, Jingjun Xu   +6 more
doaj   +1 more source

Comparative Feature-Guided Regression Network with a Model-Eye Pretrained Model for Online Refractive Error Screening

Future Internet
With the development of the internet, the incidence of myopia is showing a trend towards younger ages, making routine vision screening increasingly essential.
Jiayi Wang, Tianyou Zheng, Yang Zhang, Tianli Zheng, Weiwei Fu   +4 more
doaj   +1 more source

Photorefraction Screening Plus Atropine Treatment for Myopia is Cost-Effective: A Proof-of-Concept Markov Analysis

Clinical Ophthalmology, 2022
Chuen Yen Hong,1 Matt Boyd,2 Graham Wilson,3 Sheng Chiong Hong4 1Dunedin School of Medicine, University of Otago, Dunedin, New Zealand; 2Adapt Research Ltd, Reefton, New Zealand; 3Matai Medical Research Institute, Gisborne, New Zealand; 4oDocs Eye Care ...
Hong CY, Boyd M, Wilson G, Hong SC
doaj  

Accuracy of Plusoptix S04 in children and teens

, 2011
Objective: To compare refraction measurements of young patients obtained using Plusoptix S04 with those obtained using cycloplegic retinoscopy. Design: Cohort study. Participants: Data were collected from 64 patients (128 eyes), aged 2-19 years. Methods:
Suheyla, Kose, Ayse, Yilmaz Kiyak, Onder, Uretmen   +2 more
core   +1 more source

Can the Bruckner test be used as a rapid screening test to detect significant refractive errors in children?

Indian Journal of Ophthalmology, 2007
Purpose: To assess the suitability of Brückner test as a screening test to detect significant refractive errors in children. Materials and Methods: A pediatric ophthalmologist prospectively observed the size and location of pupillary crescent ...
Kothari Mihir
doaj  

Photorefraction Simulates Well the Plasticity of Neural Synaptic Connections

Biomimetics
In recent years, the need for systems capable of achieving the dynamic learning and information storage efficiency of the biological brain has led to the emergence of neuromorphic research.
Alessandro Bile, Hamed Tari, Riccardo Pepino, Arif Nabizada, Eugenio Fazio   +4 more
doaj   +1 more source

High-dynamic-range imaging optical detectors

, 2002
Imaging spectrometers allowing spatially resolved targets to be spectrally discriminated are valuable for remote sensing and defense applications. The drawback of such instruments is the need to quickly process very large amounts of data.
Coutinho, R.C., Selviah, D.R., Griffiths, H.D.   +2 more
core  

Deep learning method for accessible eccentric photorefraction

International audienceAffordable and accessible screening tools are crucial to diagnose and, hence, effectively address vision impairment. We propose a novel pipeline based on photorefraction which complies with these requirements.
Peloux, Marius, Vu, Mathieu, Boutinon, Stéphane, Chouzenoux, Emilie, Pesquet, Jean-Christophe, Pinault, Philippe   +5 more
core   +1 more source

Hacking continuous-variable quantum key distribution using the photorefractive effect on proton-exchanged/annealed-proton-exchanged waveguide

Scientific Reports
Lithium niobate materials, which have the potential to fabricate lasers, modulation devices, and photodetectors, are widely used in quantum information processing due to their exceptional optical and electro-optical properties.
Ningyi Mao, Hang Zhang, Zhiyue Zuo, Yijun Wang, Yiyu Mao, Ying Guo   +5 more
doaj   +1 more source

Nonlinear optical propagation in near-transition centrosymmetric photorefractive crystals

, 1999
We relate on a series of optical nonlinear propagation phenomena, mediated by photorefraction, present in ferroelectric crystals heated above the Curie point, in proximity of the critical regime.
P. DiPorto, B. Crosignani, DEL RE, EUGENIO, A. Ciattoni   +3 more
core   +1 more source