Results 151 to 160 of about 2,414 (173)

Agreement in non-cycloplegic and cycloplegic refraction between a photoscreener and a calibrated autorefractor. [PDF]

BMC Ophthalmol
Kanclerz P, Przewłócka K, Arnold RW.
europepmc   +1 more source

Estimating the Prevalence and Severity of Isolated Small-Angle Strabismic Amblyopia. [PDF]

Clin Ophthalmol
Arnold RW.
europepmc   +1 more source

Concentration Dependence of Optical Properties of Double-Doped LiTaO₃:Cr³⁺:Nd³⁺ Crystals. [PDF]

Materials (Basel)
Sidorov NV, Bobreva LA, Pyatyshev AY, Palatnikov MN, Palatnikova OV, Skrabatun AV, Teslenko AA, Tarabrin MK.   +7 more
europepmc   +1 more source

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Photorefraction of uranium-doped lithium niobate crystals at multiple visible wavelengths

CrysteEngComm, 2023
A series of uranium-doped lithium niobate crystals (LN: U) were successfully grown by the modified vertical Bridgman method and their photorefractive properties in the visible band were systematically investigated for...
Tian Tian, Yuheng Chen, Jie Zhang, Shuolin Wang, W. Yuan, Hongde Liu, Yaoqing Chu, Chengling Mao, Wenjie Xu, Dahuai Zheng, Jiayue Xu   +10 more
semanticscholar   +1 more source

The Value of Eccentric Infrared Photorefraction in Evaluating Keratoconus

Optometry and Vision Science, 2022
SIGNIFICANCE Nonlinearity in the luminance profile of eccentric, infrared photorefraction may be used to differentiate corneal diseases such as keratoconus that distort the cornea, relative to regular refractive errors.
Avina M. Patel, Preetam Kumar, P. Vaddavalli, S. Bharadwaj   +3 more
semanticscholar   +1 more source

Eccentric Infrared Photorefraction: A Review of Evolution, Optical Design, Features and Applications

Journal of Bio-optics
Photorefraction is seven-decade old technology that allows objective and non-invasive estimation of the eye’s refractive error using retro-illuminated photographs of the pupil.
S. Bharadwaj, S. Manzanera, Pablo Artal
semanticscholar   +1 more source

A feasibility study of real-time manipulation of blur feedback to accommodation using eccentric photorefraction and a tunable lens.

Optometry and Vision Science
SIGNIFICANCE This study describes a new technique that integrates an electrically tunable lens with a dynamic infrared photorefractor for real-time manipulation of blur feedback for human ocular accommodation.
Praveen K. Bandela, Arthur Ho, Eric Papas, S. Bharadwaj   +3 more
semanticscholar   +1 more source

Development of High-Accuracy Refractive Error Screening Model in Low-Resource Environments: A Hybrid Approach Using Smartphone-Based Photorefraction and Multi-Branch Convolutional Neural Network Analysis

International Conference on Medical and Health Informatics
Uncorrected refractive errors are the leading cause of preventable vision impairment globally, disproportionately affecting individuals in low-resource regions.
Muhammad Syauqie, Sutanto Priyo Hastono, K. Siregar, N. Moeloek, Harry Patria   +4 more
semanticscholar   +1 more source

Quantum Hacking: Induced‐Photorefraction Attack on a Practical Continuous‐Variable Quantum Key Distribution System

Advanced Quantum Technologies
In a practical continuous‐variable quantum key distribution (CVQKD) system, a new security loophole opened by the photorefractive effect of lithium niobate‐based (LN‐based) modulators is explored.
Yiliang Wang, Yi Zheng, Chenlei Fang, Haobin Shi, Wei Pan   +4 more
semanticscholar   +1 more source