Article
Oncology
Tong Bao, Lifeng Wang, Caihui Liu, Yajun Yang, Yunlei Pang
Summary: This study compared the biometric measurements of LS900, IOL Master, and OPD-SCAN III in patients with mild-to-moderate cataract. The results showed consistent measurements of corneal curvature and astigmatism among the three devices, but IOL Master measured a larger white to white (WTW) diameter compared to LS900 and OPD-SCAN III. The study highlights the importance of considering WTW measurement differences between these devices in cataract cases.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Article
Ophthalmology
Alberto Dominguez-Vicent, Abinaya Priya Venkataraman, Amanda Dalin, Rune Brautaset, Robert Montes-Mico
Summary: This study aimed to evaluate the repeatability and agreement of a fully automated swept-source optical coherence tomography (SS-OCT) with an optical low coherence reflectometry (OLCR) for several biometric parameters. Measurements were conducted on 74 eyes of 74 patients using Eyestar 900 SS-OCT and Lenstar LS 900 OLCR. Repeatability was assessed using intrasubject standard deviation, coefficient of variability (CoV), and coefficient of repeatability (CoR), while agreement between instruments was evaluated using Bland-Altman analysis.
Article
Ophthalmology
Pedro Tana-Rivero, Salvador Aguilar-Corcoles, Pedro Tana-Sanz, Santiago Tana-Sanz, Robert Montes-Mico
Summary: This study aimed to evaluate the success rates and agreement of different biometric parameters obtained with different biometers in dense cataracts. The results showed that optical biometers based on SS-OCT technology were more successful in measuring axial length in eyes with dense cataracts. There were significant differences between biometers for all evaluated parameters.
Article
Ophthalmology
Jiaqi Meng, Ling Wei, Wenwen He, Jiao Qi, Yi Lu, Xiangjia Zhu
Summary: In a large Chinese cataractous population, the study found that thicker lens may be associated with older age, male gender, thicker CCT, shallower ACD, larger WTW, and flatter anterior corneal curvature. The change of LT was nonlinear as AL increased, with the thickest lens seen in the 20-22 mm AL group. The correlation between LT and other biometric factors remained significant even when stratified by ALs.
Article
Ophthalmology
Ivajlo Popov, Iveta Waczulikova, Jana Stefanickova, Jela Valaskova, Dana Tomcikova, Haaris A. Shiwani, Delian Delev, Luis Rodrigo, Sandeep Saxena, Peter Kruzliak, Vladimir Krasnik
Summary: The study described the pattern and mutual relationships between basic biometric characteristics of the eye in a Central European Caucasian population, finding that males had longer axial length, elderly individuals had lower anterior chamber depth, and higher lens thickness. These data can serve as normative values for the Central European Caucasian population using Lenstar LS900.
EUROPEAN JOURNAL OF OPHTHALMOLOGY
(2022)
Article
Ophthalmology
Yiran Wang, Ting Wan, Luze Liu, Yuyuan Xue, Xinyao Chen, Giacomo Savini, Domenico Schiano-Lomoriello, Xingtao Zhou, Jinjin Yu, Jinhai Huang
Summary: The agreement of measurements between a new OLCR biometer and a SD-OCT/Placido topographer was assessed in healthy subjects. The results showed high agreement between the OLCR biometer and the SD-OCT/Placido topographer for measurements of parameters including CCT, ACD, AQD, Km, and CD.
Article
Biochemical Research Methods
Ana Rodriguez-Aramendia, Fernando Diaz-Douton, Jose Fernandez-Trullas, Pol Falgueras, Laura Gonzalez, Jaume Pujol, Ireneusz Grulkowski, Jose Luis Guell
Summary: The study demonstrates a novel SS-OCT system that alternately images the whole anterior segment and retina using a single source and detector, showing the potential for clinical application in describing and detecting early clinical features in patients.
BIOMEDICAL OPTICS EXPRESS
(2021)
Article
Ophthalmology
Jinjin Yu, Daizong Wen, Jing Zhao, Yiran Wang, Ke Feng, Ting Wan, Giacomo Savini, Colm McAlinden, Xuanqiao Lin, Lingling Niu, Sisi Chen, Qingyi Gao, Rui Ning, Yili Jin, Xingtao Zhou, Jinhai Huang
Summary: By systematically comparing and analyzing ocular measurements with big data, this study found significant differences between contact ultrasound biometry and optical biometers for measuring axial length and anterior chamber depth. The Pentacam AXL achieved the lowest values for keratometry and corneal diameter, while the OA-2000 obtained the smallest value for central corneal thickness.
Article
Ophthalmology
Daiki Sakai, Satoshi Yokota, Akiko Maeda, Yasuhiko Hirami, Makoto Nakamura, Yasuo Kurimoto
Summary: This study identified the features of ocular biometry in patients with EYS-related retinitis pigmentosa using IOLMaster 700. Compared to other patients with retinitis pigmentosa, patients with EYS-related retinitis pigmentosa had thinner central corneal thickness and smaller posterior corneal curvature radius.
Article
Ophthalmology
Ralph Michael, Justin Christopher D'Antin, Laura Pinilla Cortes, Harvey John Burd, Brian Sheil, Rafael I. Barraquer
Summary: Research on the mechanism of cortical cataract formation found that stretching leads to an increase in equatorial diameter in ex vivo lenses, but central thickness does not change significantly. Ruptures at the nucleus-cortex interface were observed in lenses with cortical cataracts, suggesting they may occur during accommodation or attempted accommodation.
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
(2021)
Article
Pediatrics
Elena Martinez-Plaza, Ainhoa Molina-Martin, Alfonso Arias-Puente, David P. Pinero
Summary: The study confirmed the consistency of measurements from the Myah device with the Myopia Master system in a pediatric population, indicating the usefulness of these data in clinical practice. The results suggest that these measurements can be used interchangeably with caution.
Article
Ophthalmology
Richul Oh, Joo Youn Oh, Hyuk Jin Choi, Mee Kum Kim, Chang Ho Yoon
Summary: This study assessed the agreement between three ocular biometric devices, ANTERION, CASIA2, and IOLMaster 700, showing that ANTERION and CASIA2 demonstrated good agreement with IOLMaster 700 except for total keratometry, whereas ANTERION and IOLMaster 700 had excellent agreement in measuring axial length.
Article
Oncology
Nilay Kandemir Besek, Senay Asik Nacaroglu, Ahmet Kirgiz, Gamze Ozturk Karabulut, Helin Okmen, Sibel Ahmet
Summary: This study evaluated the accuracy of keratometric values obtained from Sirius topography using Nidek AL-Scan optical biometry for IOL power calculating after PK. The results showed that both devices correctly calculated IOL power after PK, but Sirius SimK (3mm) gave the lowest mean absolute error (MAE) results and can be safely used for IOL power calculation.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2023)
Article
Medicine, General & Internal
Hideki Fukumitsu, Vicent J. Camps, Sara Miraflores, David P. Pinero
Summary: This study characterized the variations of clinical effective lens position and intraocular lens position after cataract surgery with single-piece monofocal IOLs, finding that changes in refraction from 1 to 6 months postoperatively are not clinically relevant due to good positional stability. The study also showed a strong correlation between changes in spherical equivalent and clinical ELP over time, highlighting the importance of considering these factors in IOL power calculations.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Ophthalmology
Rohan P. J. Hughes, Scott A. Read, Michael J. Collins, Stephen J. Vincent
Summary: This study investigated the differences in accommodation-induced axial elongation between myopic and nonmyopic children. The results showed that myopic children exhibited significantly greater accommodation-induced axial elongation than nonmyopic children. This finding could support a potential mechanism linking near work, axial elongation, and myopia development in children.
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
(2022)
Article
Astronomy & Astrophysics
J. F. Mahlmann, M. A. Aloy, V Mewes, P. Cerda-Duran
Summary: Scientific codes serve as a crucial link between theory and experiment, providing insight into extreme energy flows in the universe. Understanding numerical diffusion in these codes is essential for assessing their reliability, with a minimum of eight numerical cells per characteristic size needed for consistency between numerical and physical results. High-order discretization of force-free currents can achieve nearly ideal convergence for smooth plasma wave dynamics, but modeling resistive layers requires suitable current prescriptions or sub-grid modeling for parallel current evolution.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
J. F. Mahlmann, M. A. Aloy, V Mewes, P. Cerda-Duran
Summary: This study introduces a method called general relativistic force-free electrodynamics to analyze energetic outflows dominated by strong magnetic fields, discussing its application in modeling the dynamics of magnetospheres around compact astrophysical objects like black holes and neutron stars.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
M. Reichert, M. Obergaulinger, M. Eichler, M. A. Aloy, A. Arcones
Summary: This study presents the nucleosynthesis of magneto-rotational supernovae based on 2D simulations with accurate neutrino transport for the first time. Different rotation and magnetic field models are analyzed to explore their impact on the nucleosynthesis processes. Results indicate that the strength of the magnetic field influences the production of heavy elements through the r-process, while accurate neutrino transport is crucial in analyzing the ejecta composition.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Ophthalmology
Robert Montes-Mico
Summary: This study evaluated the repeatability and agreement of various biometric parameters using 6 biometers based on different optical technologies. The results showed that these biometers provided repeatable measurements for different parameters, but there were significant differences between the biometers. Therefore, the interchangeability of these devices should be carefully considered when using them.
JOURNAL OF CATARACT AND REFRACTIVE SURGERY
(2022)
Article
Ophthalmology
Francisco Pastor-Pascual, Rafael Pastor-Pascual, Robert Montes-Mico, Ramon Ruiz-Mesa, Pedro Tana-Rivero
Summary: The study results indicate that using Precizon IOL after FLACS in patients with different degrees of astigmatism can provide good visual acuity, accurate refractive outcomes, and excellent rotational stability.
INTERNATIONAL OPHTHALMOLOGY
(2022)
Article
Astronomy & Astrophysics
J. F. Mahlmann, M. A. Aloy
Summary: This study examines the impact of numerical diffusivity on the overall dynamics of force-free aligned pulsar magnetospheres, assessing constraint violations as a diffusivity source and the effects of modifications on electric fields. By comparing different techniques to model rho, the global consequences of diffusivity are quantified. The conservative approach reduces Poynting flux dissipation in the ECS and increases pulsar luminosity by shifting the Y-point location, with luminosity changes proportional to alpha(0.11).
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Raphael Raynaud, Pablo Cerda-Duran, Jerome Guilet
Summary: Gravitational waves provide a unique window to constrain dynamics in proto-neutron stars during core collapse supernovae. Convection and magnetic fields play important roles in neutron star formation, with magnetic fields slightly affecting gravitational wave amplitude in slow rotation regimes and dramatically changing it in fast rotation scenarios. The observed excess of low-frequency gravitational waves at the transition to a strong field dynamo could be used to determine dynamo efficiency in proto-neutron stars.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Ophthalmology
Pedro Tana-Rivero, Ramon Ruiz-Mesa, Salvador Aguilar-Corcoles, Cristina Tello-Elordi, Maria Ramos-Alzamora, Robert Montes-Mico
Summary: Using the same high-resolution SS-OCT device, lens vault (LV) was measured in healthy eyes, revealing correlations with anterior chamber depth, axial length, anterior chamber volume, lens thickness, and age.
JOURNAL OF OPTOMETRY
(2022)
Article
Astronomy & Astrophysics
M. Obergaulinger, M. A. Aloy
Summary: The collapse of massive star cores can have various outcomes regarding energy release, nucleosynthesis, and remnants. The relationship between explosion and remnant types and the properties of the progenitors is still an open question. The rotation and magnetic fields in Wolf-Rayet stars may explain extreme events like superluminous supernovae and gamma-ray bursts.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Adam Griffiths, Patrick Eggenberger, Georges Meynet, Facundo Moyano, Miguel-A Aloy
Summary: This study explores the effects of the magneto-rotational instability (MRI) on the evolution of massive stars. The results show that the activation of MRI is highly sensitive to the treatment of meridional circulation and the existence of chemical gradients. The MRI efficiently transports matter and angular momentum, leading to noticeable differences in rotation rates and chemical structure of stars.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
O. Just, M. A. Aloy, M. Obergaulinger, S. Nagataki
Summary: This study presents global models of collapsars and finds that neutron-rich, neutrino-dominated accretion flows are only established for short times or relatively low viscosities, while stable NDAFs are unable to release neutron-rich ejecta. The research suggests that collapsar models based on the alpha-viscosity are inefficient r-process sites and that magnetohydrodynamic effects may be required to generate neutron-rich outflows to improve the prospects for obtaining neutron-rich ejecta.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
Miquel Miravet-Tenes, Pablo Cerda-Duran, Martin Obergaulinger, Jose A. Font
Summary: In this study, a new sub-grid model called MInIT mean-field model is proposed to capture the effects of turbulence at small scales. Through linking the turbulent stress tensors with the energy densities, the model successfully simulates the DNS data of MRI in-box and compares it with the filtered data.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
M. Reichert, M. Obergaulinger, M. A. Aloy, M. Gabler, A. Arcones, F. K. Thielemann
Summary: Magnetorotational supernovae are a rare type of core-collapse supernovae that involve magnetic fields and rotation in the explosion dynamics. Post-processed nucleosynthesis of neutrino-MHD supernova models reveals three mechanisms for heavy r-process element production. The study highlights the role of magnetorotational supernovae in hypernovae, superluminous supernovae, and heavy element synthesis.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Noah E. Wolfe, Carla Frohlich, Jonah M. Miller, Alejandro Torres-Forne, Pablo Cerda-Duran
Summary: This study builds a comprehensive suite of over 1000 exploding CCSNe models to analyze the resonant gravitational wave frequencies of the proto-neutron star (PNS). The study identifies characteristic frequencies that can measure the surface gravity of the cold remnant neutron star and constrain the hot nuclear equation of state. However, the study finds that the details of the CCSN models and whether it undergoes an explosion significantly affect the magnitude and evolution of the PNS eigenfrequencies.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Fabrizio Di Giovanni, Nicolas Sanchis-Gual, Pablo Cerda-Duran, Jose A. Font
Summary: This study constructs equilibrium configurations of mixed fermion-boson stars with realistic equations of state for the fermionic component and different percentages of bosonic matter, and demonstrates that these solutions are in good agreement with observational data and nuclear physics constraints.