Results 121 to 130 of about 42,051 (253)

Comparison of ocular residual astigmatism between children with clinically significant and non-significant astigmatism

BMC Ophthalmology
Purpose To compare the difference of ocular residual astigmatism (ORA) in children with clinically significant astigmatism and non-significant astigmatism. Methods This is a cross-sectional study. Participants were divided into the clinically significant
Jian Lin, Dexiang An, Jun Zhu, Dongmei Yan   +3 more
doaj   +1 more source

Investigating the impact of residual refraction within ±1.0 dioptre on uncorrected distance visual acuity in pseudophakic eyes: a cross-sectional study

BMJ Open
Objectives To investigate the impact of residual refraction within ±1.0 dioptre (D) on uncorrected distance visual acuity (UDVA) in pseudophakic eyes.Design Cross-sectional study.Setting This study was based on retrospectively collected electronic ...
Ling Jin, Xiaotong Han, Wenjia Cai, Yizhi Liu, Qianzhong Cao, Jiaqing Zhang, Danmei Li, Linxing Chen   +7 more
doaj   +1 more source

Fluctuations of Anterior Chamber Depth and Astigmatism in Pseudophakic Eyes [PDF]

Larysa Tutchenko,1,* Sudi Patel,2,* Mykhailo Skovron,1,* Oleksiy V Voytsekhivskyy,1,* Fanka Gilevska3,* 1Department of Corneal Pathology, Ophthalmic Oncology and Oculoplasty, Kyiv Clinical Ophthalmology Hospital Eye Microsurgery ...
Tutchenko L, Gilevska F, Patel S, Skovron M, Voytsekhivskyy OV   +4 more
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Astigmatism-controlled beam shaping for high-quality fibre Bragg grating inscription using femtosecond laser [PDF]

We present an astigmatism-controlled beam-shaping technique for femtosecond laser inscription of FBGs, optimizing beam profiles using a cylindrical lens to mitigate focal distortion and enhance grating quality.
Zhou, Kaiming, Ma, Yuehui, Kamarudin, Lukman, Li, Jiaxuan, Sun, Bing   +4 more
core   +1 more source

Near and distance vergence facility provides complementary clinical information in concussion‐related convergence insufficiency

Optometry and Vision Science, Volume 103, Issue 9, September 2026.
ABSTRACT Purpose To compare near and distance vergence facility testing in adolescents and young adults with concussion‐related convergence insufficiency and evaluate changes following office‐based vergence/accommodative therapy (OBVAM). Methods This secondary analysis of the CONCUSS randomized clinical trial evaluated vergence facility at near (40 cm)
Mitchell Scheiman, Tara L. Alvarez, Farzin Hajebrahimi, Melissa Noble, Matthew L. Robich, Rebecca Baro, Josie A. Bachman, Christina L. Master, Arlene Goodman, the CONCUSS Investigator Group, Katie Rownd, Jordan Wentz, Melissa Crawford, Regina Antoni   +13 more
wiley   +1 more source

Evaluation of Refractive Results of LASIK and LASEK in Patients with Myopia and Myopic Astigmatism

, 2014
Objectives: To compare the mean visual acuity, spherical equivalent (SE), cylindrical refractive error, and central corneal thickness (CCT) results of LASIK and LASEK in patients with myopia and myopic astigmatism.
Okan Taşkın, Zeynep Özbek
core   +1 more source

Supersampled Scanning Transmission X‐Ray Microscopy for High‐Resolution Vibration‐Independent Time‐Resolved Imaging

Small, Volume 22, Issue 50, 7 September 2026.
ABSTRACT Scanning transmission x‐ray microscopy (STXM) is a nanoscale imaging technique that can utilize several powerful contrast mechanisms for the quantitative mapping of chemical and physical materials properties. Spatial resolutions down to 7 nm at the soft x‐ray energy range have been demonstrated.
Simone Finizio, Benjamin Watts, Benedikt Rösner, Tim A. Butcher, Sebastian Wintz, Markus Weigand, Jörg Raabe   +6 more
wiley   +1 more source

Outcomes of One Dioptre Toric IOL Correction in Low Corneal Astigmatism: A Comparison with Non-toric IOLs

Ophthalmology and Therapy
Introduction Toric intraocular lenses (IOLs) effectively correct astigmatism, but their benefit at low levels of corneal astigmatism remains uncertain.
Ben Connell, Jack Kane
doaj   +1 more source

Focusing, collimation, and beam expansion of high‐energy X‐rays with diamond refractive lenses

Journal of Synchrotron Radiation, Volume 33, Issue 5, Page 1326-1337, September 2026.
The effectiveness and versatility of diamond refractive optics for high‐energy X‐rays (> 40 keV) is presented in applications to focusing, collimation, and beam expansion, along with design and implementation details.Diamond is extremely well suited for synchrotron X‐ray refractive optics.
Sarvjit D. Shastri, Sergey Antipov
wiley   +1 more source

Patterns of Corneal Astigmatism in Eyes Post Myopic Laser Keratorefractive Surgery [PDF]

Aaron W Ng,1,2 Stephen Stewart,1– 4 Tun Kuan Yeo1,2,5 1Department of Ophthalmology, Tan Tock Seng Hospital, Singapore; 2NHG Eye Institute, Singapore; 3Cathedral Eye Clinic, Belfast, UK; 4Centre of Public Health, Queen’s University, Belfast, UK; 5Eye ...
Yeo TK, Ng AW, Stewart S
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