Results 21 to 30 of about 2,414 (173)

Induced-Photorefraction Attack against Quantum key Distribution [PDF]

Physical Review Applied, 2023
Lithium niobate (LiNbO3, LN) devices play critical roles in quantum information processing. However, for special applications like quantum key distribution (QKD), the characteristics of materials and devices and their impact on practical systems must be ...
Peng Ye, Wei Chen, Guo‐Wei Zhang, Feng-Yu Lu, Fang‐Xiang Wang, Guangcan Huang, Shuang Wang, De-Yong He, Zhen-Qiang Yin, G. Guo, Z. Han   +10 more
semanticscholar   +1 more source

Photorefraction‐Assisted Self‐Emergence of Dissipative Kerr Solitons [PDF]

Laser & Photonics Reviews, 2023
Generated in high‐Q optical microresonators, dissipative Kerr soliton microcombs constitute broadband optical frequency combs with chip sizes and repetition rates in the microwave to millimeter‐wave range.
Shuai Wan, Pi-Yu Wang, Rui Ma, Zheng-Yu Wang, Rui Niu, De-Yong He, Guang-can Guo, Fang Bo, Junqiu Liu, C. Dong   +9 more
semanticscholar   +1 more source

Electrically pumped soliton microcombs on thin-film lithium niobate. [PDF]

Nanophotonics
Abstract Thin‐film lithium niobate (TFLN) has enabled efficient on‐chip electro‐optic modulation and frequency conversion for information processing and precision measurement. Extending these capabilities with optical frequency combs unlocks massively parallel operations and coherent optical‐to‐microwave transduction, which are achievable in TFLN ...
Lv X, Wang Z, Xu T, Yang C, Jin X, Nie B, Qian D, Liu Y, Zhu K, Ni B, Gong Q, Bo F, Yang QF.   +12 more
europepmc   +2 more sources

Recommended practices for vision screening in pre-school-age children: A 2025 update. [PDF]

Optom Vis Sci
SIGNIFICANCE: Despite significant evidence supporting the utility of vision screening for identifying children who need further evaluation by an eye care professional, there is considerable variability in screening guidelines along with a lack of consensus for monitoring and reporting outcomes.
Pang Y, Lyons SA, Nottingham Chaplin PK, Block SS, Fishman D, Ciner EB, Advisory Committee to the National Center for Children’s Vision and Eye Health at Prevent Blindness.   +6 more
europepmc   +2 more sources

Vergence and accommodation responses in the control of intermittent exotropia

Ophthalmic and Physiological Optics, Volume 43, Issue 4, Page 598-614, July 2023., 2023
Abstract Purpose Individuals with different types of intermittent exotropia (IXT) may use neurally coupled accommodation and vergence responses differently from those without exotropia to achieve eye alignment. This study examined the relationship between simultaneously recorded accommodation and vergence responses in children and young adults with a ...
Clara Mestre, Sonisha Neupane, Vivian Manh, Kristina Tarczy‐Hornoch, T. Rowan Candy   +4 more
wiley   +1 more source

Role of microfluctuations in accommodation: a novel approach to reduce non-accommodative noise [PDF]

International Journal of Ophthalmology, 2019
Accommodative response and its possible role in myopia development has been explored through the study of the microfluctuations (MFs) of accommodation, which are commonly divided in high (1.0 to 2.3 Hz) and low (0.1 to 0.6 Hz) frequency components ...
Núria Lupón, Joan Gispets, Genis Cardona, Alba Tàpia, Hector Abril   +4 more
doaj   +1 more source

Worsening vision at age 4–5 in England post‐COVID: Evidence from a large database of vision screening data

Ophthalmic and Physiological Optics, Volume 43, Issue 3, Page 454-465, May 2023., 2023
Abstract Purpose Myopia prevalence has increased in the UK at age 10‐16y, but little is known about younger children. We hypothesise that if the ‘myopia epidemic’ is affecting young children, then there will be increasing rates of bilateral reduced unaided vision (V) at vision screenings of children 4–5 years of age.
Rakhee Shah, David F. Edgar, Bruce J. W. Evans   +2 more
wiley   +1 more source

Accuracy and repeatability of refractive error measurements by photorefractometry

Journal of Ophthalmic & Vision Research, 2015
Purpose: To determine the accuracy of photorefraction and autorefraction as compared to cycloautorefraction and to detect the repeatability of photorefraction.
Zhale Rajavi, Hamideh Sabbaghi, Ahmad Shojaei Baghini, Mehdi Yaseri, Koroush Sheibani, Ghazal Norouzi   +5 more
doaj   +1 more source

Test-Retest of the Spot Vision Screener among Children with Ophthalmological Diseases including Strabismus. [PDF]

J Ophthalmol
Background. The spot vision screener (SVS) has been widely used for eye health examinations of infants and young children. The purpose of this study was to evaluate the reproducibility of two SVS measurements in children with ophthalmological diseases. Methods.
Ichimura M, Ueki S, Fukuchi T.
europepmc   +2 more sources

Systematic review and meta‐analysis on the agreement of non‐cycloplegic and cycloplegic refraction in children

Ophthalmic and Physiological Optics, Volume 42, Issue 6, Page 1276-1288, November 2022., 2022
Abstract Objective To determine the diagnostic agreement of non‐cycloplegic and cycloplegic refraction in children. Method The study methodology followed Preferred Reporting Items for Systematic Reviews and Meta‐Analyses (PRISMA) guidelines. Electronic databases were searched for comparative studies exploring refraction performed on children under non ...
Salma Wilson, Irene Ctori, Rakhee Shah, Catherine Suttle, Miriam L. Conway   +4 more
wiley   +1 more source