Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Purpose: To compare the clinical results of the spherical aberration-free Akreos AO (Bausch & Lomb) with the Akreos Adapt (Bausch & Lomb), the parent model of spherical optic design.
Methods: Fifty patients (100 eyes) were randomly assigned to bilaterally receive Akreos AO or Akreos Adapt intraocular lenses (IOLs) after phacoemulsification. At 6 months postoperatively, best-corrected contrast sensitivities were determined at 3, 4.8, 7.5, 12 and 19 cycles per degree using a Visual Capacity Analyzer (L2 Informatique) under mesopic (5 cd/m(2)) and photopic (100 cd/m(2)) conditions with undilated pupils. Wavefront analysis of total aberration was performed with the WaveScan WaveFront System (Advanced Medical Optics VISX).
Results: Postoperative contrast sensitivities were not statistically different under mesopic and photopic conditions. On the other hand, fourth-order spherical aberration was lower in the AO group than the Adapt group with only a marginal difference (p = 0.048). Other higher-order aberrations such as coma and trefoil were not significantly different between the two groups (p = 0.657, 0.614). The questionnaire on subjective visual quality in terms of glare disability, distant vision and night driving did not reveal an improved visual function in the AO group.
Conclusion: The spherical aberration-free Akreos AO IOL did not show improved visual quality compared with its spherical counterpart.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1159/000219857 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Analysis of the Effect of Pupil Size and Corneal Aberration on the Optical Performance of Premium Intraocular Lenses.
J Clin Med
July 2025
Department of Condensed Matter Physics, Faculty of Sciences, University of Cadiz, 11510 Puerto Real, Cádiz, Spain.
: To assess the optical performance of two refractive premium IOLs across pupil sizes and values of corneal spherical aberration (SA). : Two refractive IOLs were evaluated in this study: Tecnis Eyhance and Mini Well. The surface profiles were obtained to calculate the through-object MTF (TO MTF) curves and simulate optotype images.
View Article and Find Full Text PDFThe modified Luneburg lens, otherwise known as the Gutman lens, is a gradient-index spherical lens whose focus occurs inside the lens in the stigmatic case (aberration-free). When the focus is set to lie outside the lens, spherical aberration is introduced. Recently, a scaled version of Gutman's equation has been proposed to minimize this aberration and the corresponding lens was referred to as the reduced aberration acoustic Luneburg lens.
View Article and Find Full Text PDFTransmission electron microscope with a mirror objective free of spherical and axial chromatic aberrations.
Ultramicroscopy
October 2025
G. Daukeev Almaty University of Power Engineering and Telecommunication, Baytursynuli 126/1, Almaty, 050013, Kazakhstan. Electronic address:
The basic scheme of a transmission electron microscope (TEM) with a mirror objective free of spherical and axial chromatic aberrations, which are the main factors limiting the resolution of electron microscopes, is considered. As an objective, an axisymmetric electrostatic mirror (ASEM), the electrodes of which are coaxial cylinders of equal diameter, separated by gaps of finite width, is considered. Based on previously developed aberration concepts, taking into account relativistic effects, the families of three-electrode ASEM are calculated that satisfy the condition of eliminating spherical and axial chromatic aberrations simultaneously at a fixed focal length and a finite width of the interelectrode gaps.
View Article and Find Full Text PDFPurpose: To evaluate the efficacy, predictability, and safety of laser in situ keratomileusis (LASIK) for the correction of myopia and myopic astigmatism using the SCHWIND Amaris 1050RS excimer laser (SCHWIND eye-tech-solutions).
Methods: This was a prospective cohort study of 1,420 eyes with myopia or myopic astigmatism that underwent LASIK in a single tertiary center between January 2017 and April 2022. The IntraLase iFS femtosecond laser (Johnson & Johnson Vision) was used for flap creation and excimer laser ablation was performed using the SCHWIND Amaris 1050RS with aspheric aberration-free ablation profile, asymmetric pupillary offset, and seven-dimensional eye tracking.
We theoretically demonstrate that ponderomotive interactions near the electron cross-over can be used for aberration correction in ultrafast electron microscopes. Highly magnified electron shadow images from SiN thin films are utilized to visualize the distortions induced by spherical aberrations. Our simulations of electron-light interactions indicate that spherical aberrations can be compensated resulting in an aberration-free angle of 8.
View Article and Find Full Text PDF