Results 141 to 150 of about 972,865 (242)
Surgical correction of refractive errors [PDF]
Journal of the Royal Society of Medicine, 2000 A, Brahma, C N, McGhee
openaire +3 more sources
Refractive errors in patients with fundus flavimaculatus
, 1982 SUMMARY A total of 59 patients (118 eyes) with fundus flavimaculatus who had atrophic macular lesions were examined for refractive error. Myopic refractions of greater than-0-1 dioptre were seen in 12 % of a normal population and in 76 % of our patient ...
David S. Doka +2 more
core
On‐Chip Photonic Neural Network Architectures
Advanced Optical Materials, EarlyView.This review presents a comprehensive overview of on‐chip photonic neural network architectures, covering key photonic building blocks, representative network types, and emerging applications. Recent advances, implementation challenges, and future directions are examined, highlighting the potential of integrated photonics to enable ultrafast, energy ...
Seokjin Hong +7 more
wiley +1 more source
Enhancement of Circular Dichroism in Chiral Dielectric Metasurfaces by Ion Beam Irradiation
Advanced Optical Materials, EarlyView.Ion beam irradiation enables post fabrication tuning of dissipative losses in chiral dielectric metasurfaces composed of C4 symmetric silicon nanostructures. By tailoring the absorption toward critical coupling condition, circular dichroism is enhanced from 0.70 to 0.85, demonstrating a versatile route for maximizing optical chirality and polarization ...
Anna Fitriana +6 more
wiley +1 more source
Optical services through outreach in South India: a case study from Aravind Eye Hospitals
Community Eye Health Journal, 2006 The need to correct refractive errors Refractive errors are a priority within the global initiative for the elimination of avoidable blindness, VISION 2020: The Right to Sight.1,4 Until recently, refractive errors never figured as a cause of vision ...
Ramasamy Meenakshi Sundaram +1 more
doaj
Seven‐Fold Compression of Mid‐Infrared Pulses Using a Series of Titanium Dioxide Plates
Advanced Optical Materials, EarlyView.Here, a sequence of three titanium dioxide plates is used to compress a mid‐infrared pulse from 103.9 femtoseconds to 14.1 femtoseconds (about two optical cycles) without the use of external dispersion compensation. The approach maintains high efficiency and produces pulses with a stable carrier‐envelope phase, providing a compact platform for ...
André M. Côté +4 more
wiley +1 more source
National Journal of Community Medicine, 2018 Introduction: Refractive Error is an avoidable cause of visual im- pairment. Treatment of refractive errors is perhaps the simplest and effective forms of eye care.
Vincy Nelson +2 more
doaj
Advanced Optical Materials, EarlyView.Low‐index and low‐loss vdW muscovite represents an emerging robust dielectric platform for the creation of next‐generation all‐vdW nanophotonic architectures. Its utilization as a low‐index building‐block in all‐vdW multilayers enables extreme optical contrast when paired with MoS2, paving the way to the realization of few‐layer ultrathin DBS ...
Meri H. Hayrapetyan +10 more
wiley +1 more source
Scalable Design and Optimization of Reconfigurable Sb2S3 Metasurfaces
Advanced Optical Materials, EarlyView.Scalable optimization methodologies are developed for reconfigurable Sb2S3 Huygens metasurfaces by combining localized phase‐match and overlap‐integral cost functions that account for inter‐element coupling. The framework enables computationally efficient design of large‐area, dual‐state flat optical devices with arbitrary wavefront transformations ...
Siddharth Padmanabha +2 more
wiley +1 more source
Wavelength‐Multiplexed 2D Beam Steering via a Passive Diffractive Network
Advanced Optical Materials, EarlyView.Illustration of a wavelength‐multiplexed diffractive beam steering system, which is composed of K cascaded diffractive layers, each containing phase‐modulating elements that are jointly optimized using deep learning–based optimization. When illuminated with a set of wavelengths {λ1,λ2,…,λNw}$\{ {{{\lambda }_1},{{\lambda }_2},\ldots ,{{\lambda }_{{{N}_w}
Che‐Yung Shen +5 more
wiley +1 more source