Results 121 to 130 of about 46,071 (297)

Future Problems of Uncorrected Refractive Errors in Children

, 2014
Visual impairment secondary to uncorrected refractive errors in childhood is an important health problem, and can lead social, educational and economical disability in adulthood.
Toprak, Ibrahim, Kılıç Toprak, Emine, Kilic-Toprak, Emine   +2 more
core   +1 more source

Factors Associated with Refractive Errors among School Children in Rural Field Practice Area of a Tertiary Care Hospital, Bangalore

National Journal of Community Medicine, 2018
Background: 285 million people are visually impaired worldwide. An estimated 19 million children are visually impaired, and 12million are visually impaired due to Refractive Errors.
Usha S, Vidusha S S Karavadi, Damayanthi MN   +2 more
doaj  

Tunable Extraordinary Optical Transmission in the Long‐Wavelength Infrared Range Using Electrostatic MEMS Actuation

Advanced Materials Technologies, EarlyView.
A MEMS‐integrated metamaterial filter enables continuous, low‐voltage spectral tuning in the long‐wavelength infrared (LWIR). The device employs extraordinary optical transmission in a dual suspended metasurface stack, where electrostatic actuation precisely controls the intermembrane air gap.
Oleg Bannik, Fedor Kovalev, Michal Zawierta, Dilusha Silva, Lorenzo Faraone, Ilya Shadrivov, Mariusz Martyniuk   +6 more
wiley   +1 more source

Sources of Medical Error in Refractive Surgery

, 2013
To evaluate the causes of laser programming errors in refractive surgery and outcomes in these cases. In this multicenter, retrospective chart review, 22 eyes of 18 patients who had incorrect data entered into the refractive laser computer system at the ...
Sonal B. Dave, David B. Cano, Jason N. Edmonds, Neal A. Sher, Moshirfar, Majid, Trattler, William B, Stephen E. Pascucci, Culbertson, William W, Majid Moshirfar, Christiansen, Steven M, Steven M. Christiansen, Edmonds, Jason N, Simpson, Rachel G, Dave, Sonal B, Rachel G. Simpson, Cano, David B, William B. Trattler, Pascucci, Stephen E, Sher, Neal A, William W. Culbertson   +19 more
core   +1 more source

Frequency of Refractive Errors in Children Visiting Eye Out Patients Department Agency Headquarter Hospital Landi Kotal

Gomal Journal of Medical Sciences, 2009
Background: Refractive errors in children are one of the leading causes of preventable blindness. Prevalence of various refractive errors in children is alarming.
Mohammad Junaid Sethi, Sadia Sethi, Rashid Iqbal   +2 more
doaj  

Thickness‐Dependent Infrared Emissivity of Ultrathin Freestanding MoSiN Nanocomposite Membranes

Advanced Optical Materials, EarlyView.
ABSTRACT Metals and dielectrics show opposite trends in thickness‐dependent infrared emissivity: metallic films exhibit a rise in emissivity below a critical thickness, while dielectric films show a corresponding decline. For applications demanding both high emissivity and mechanical strength in membranes with nanoscale thickness, combining these ...
Reethu Sebastian, Amrid Amnache, Nadi Braidy, Luc G. Fréchette   +3 more
wiley   +1 more source

Proportion of refractive errors among undergraduate students of a medical college in South Kerala

Journal of Clinical Ophthalmology and Research
Background: Refractive errors are a leading cause of vision impairment, affecting over a billion people worldwide. Medical students are at high risk due to prolonged screen exposure and academic demands.
S. N. Ajas, N. Asha Raby
doaj   +1 more source

Data‐Efficient Electromagnetic Surrogate Solver Through Dissipative Relaxation Transfer Learning

Advanced Optical Materials, EarlyView.
Dissipative relaxation transfer learning (DIRTL) enables data‐efficient training of electromagnetic surrogate solvers by pretraining data generated with artificial material loss before fine‐tuning on target lossless data. The framework suppresses resonant outlier effects during early training, allowing effective adaptation to high‐amplitude resonances ...
Sunghyun Nam, Chan Y. Park, Min Seok Jang   +2 more
wiley   +1 more source

ERRORS OF REFRACTION [PDF]

British Journal of Ophthalmology, 1918
openaire   +2 more sources

Harnessing Ultrafast Optical Pulses for 3D Microfabrication by Selective Tweezing and Immobilization of Colloidal Particles in an Integrated System

Advanced Photonics Research, Volume 6, Issue 5, May 2025.
Microfabrication using nano‐ to micron‐sized blocks has transformative potential for next‐gen electronics, optoelectronics, and materials. Traditional methods are limited by scalability and precision. STIC, a single‐laser system for precise colloid manipulation and immobilization using femtosecond lasers, is introduced that enables efficient 3D ...
Krishangi Krishna, Jieliyue Sun, Wenyu Liu, Robert H. Hurt, Kimani C. Toussaint Jr.   +4 more
wiley   +1 more source