Purpose: Comparison of CSF in groups with diffractive lens SA60D3 and with monofocal lens MA60BM, and applying results to healthy population.
Material And Methods: The study included 3 groups of patients. First group consisted of 10 patients, who have undergone implant surgeries with diffractive lenses SA60D3 in both eyes; second group included 9 patients after implant surgeries with monofocal lenses MA60BM in both eyes. Third group included 10 patients with clear own lens. Groups were homogenous to number of patients, age and gender structure, as well as BCVA. CSF was determined for each eye. In the case of operated patients studies were performed 6 months after surgery. Homogeneity of groups was determined with Kruskal-Wallis test, but results of the studies were tested with variance. Results were shown in normalized CSF version.
Results: In conducted studies there was no statistical difference in specific evaluated cpd (3, 6, 12, 18) between SA60D3 group and MA60BM group after 6 months from surgery (p = 0.892, p = 0.926, p = 0.564, p = 0.9953). The above results were obtained by testing variance at confidence level p < or = 0.01. At the higher confidence level p < or = 0.05 there was significant difference between SA60D3 group, MA60BM group and healthy control.
Conclusions: Diffractive lenses SA60D3 decrease CSF in comparable range as monofocal MA60BM lenses, which does not change acceptable standard for quality vision for monofocal lenses, that is currently accepted.
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Int J Ophthalmol
January 2025
Department of Ophthalmology, University of Montreal, Quebec H3T 1J4, Canada.
Aim: To assess visual outcomes and satisfaction of a non-diffractive extended depth of focus (EDOF) intraocular lens (IOL) in individuals with ocular hypertension (OHT) and well-controlled mild glaucoma undergoing cataract surgery.
Methods: An investigator-initiated, single-center, prospective, interventional, noncomparative study conducted in Montreal, Canada. The study enrolled 31 patients (55 eyes) with OHT or mild glaucoma who received a non-diffractive EDOF IOL (Acrysof IQ Vivity).
Struct Dyn
January 2025
Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
Sub-ångström spatial resolution of electron density coupled with sub-femtosecond to few-femtosecond temporal resolution is required to directly observe the dynamics of the electronic structure of a molecule after photoinitiation or some other ultrafast perturbation, such as by soft X-rays. Meeting this challenge, pushing the field of quantum crystallography to attosecond timescales, would bring insights into how the electronic and nuclear degrees of freedom couple, enable the study of quantum coherences involved in molecular dynamics, and ultimately enable these dynamics to be controlled. Here, we propose to reach this realm by employing convergent-beam x-ray crystallography with high-power attosecond pulses from a hard-x-ray free-electron laser.
View Article and Find Full Text PDFBiomed Opt Express
January 2025
Center for Visual Science, The Institute of Optics, Flaum Eye Institute. University of Rochester, Rochester, NY, USA.
An intraocular lens (IOL) replaces the natural crystalline lens during cataract surgery, and although the vast majority of implants have simple optics, "advanced technology" IOLs have multifocal and extended depth of focus (EDOF) properties. Optical concepts are evaluated here, with image contrast, focal range, and unwanted visual phenomena being the primary concerns. Visual phenomena with earlier bifocal diffractive lenses led to alternative diffractive designs (trifocals, etc.
View Article and Find Full Text PDFIn this Letter, we present a novel, to the best of our knowledge, approach for recovering objects directly from the Fraunhofer diffraction integral, where the diffraction field of an object is approximated by the Fourier transform of this object augmented by an additional phase factor. This phase factor at the observation plane is universal for the diffraction fields generated by objects located at the same plane and illuminated by the same monochromatic plane wave. It can be first extracted from dividing the Fraunhofer diffraction field by the Fourier transform of an object reference.
View Article and Find Full Text PDFLight Sci Appl
January 2025
Institute for Photon Science and Technology, The University of Tokyo, Tokyo, Japan.
Light manipulation and control are essential in various contemporary technologies, and as these technologies evolve, the demand for miniaturized optical components increases. Planar-lens technologies, such as metasurfaces and diffractive optical elements, have gained attention in recent years for their potential to dramatically reduce the thickness of traditional refractive optical systems. However, their fabrication, particularly for visible wavelengths, involves complex and costly processes, such as high-resolution lithography and dry-etching, which has limited their availability.
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