Holographic microscopy combined with forward modeling and inference allows colloidal particles to be characterized tracked in three dimensions high precision. However, current models ignore the effects of optical aberrations on hologram formation. We investigate spherical aberration structure single-particle holograms accuracy particle characterization. find that a typical experimental setup, c...

Unlike light microscopy, where resolution is diffraction limited, the achievable resolution of electron microscopes is limited by lens aberrations so severe that the practical resolution is orders of magnitude worse than the diffraction limit. About 10 years ago, the first practical electron lens spherical aberration correctors were developed, and in the past decade, their performance, versatil...

PURPOSE To determine in vitro image qualities of artificial eyes achieved with spherical, aberration-free, average spherical aberration-correcting, and customized spherical aberration-correcting IOLs in centered, decentered, and tilted positions. METHODS The in vitro performance of these IOL models was determined by optical bench measurements. The experimental setup included a laser light sou...

PURPOSE To evaluate higher-order aberrations (HOAs) after implantation of Artiflex phakic intraocular lenses (pIOLs). SETTING Department of Ophthalmology, Academic Hospital Maastricht, Maastricht, The Netherlands. METHODS This retrospective comparative case series comprised 27 eyes (14 patients) that had Artiflex pIOL implantation and 22 eyes (13 patients) that had Artisan pIOL implantation...

Chromatic aberration is observable especially with wide angle lenses. This paper presents a study on chromatic aberration of two fisheye lenses. Both tested lenses produce images with obvious colour aberration. Four different mathematical models were tested to compensate the aberration of distinct colour channels; shift and scale, affine, projective and polynomial. The model parameters were obt...

PURPOSE To evaluate the correlation between refractive error and higher-order aberrations (HOAs) in patients with myopic astigmatism. METHODS HOAs were measured using the Zywave II aberrometer over a 6 mm pupil. Correlations between HOAs and myopia, astigmatism, and age were analyzed. RESULTS One hundred and twenty-six eyes of 63 subjects with mean age of 26.4±5.9 years were studied. Mean s...

For some time the writer has been seeking improved understanding of the several kinds of aberration—these being rather superficially explained in most texts, particularly texts of relativity theory. Indeed, in some of the more highly regarded of these (e.g., Møller 1972) the phenomenon of stellar aberration is so slightingly treated that use of the formulas provided would literally yield wrong ...

objective: classic cell culture and karyotyping is routinely used for prenatal detection of different chromosomal abnormalities. molecular cytogenetic techniques have also recently been developed and used for this purpose. quantitative florescence pcr using short tandem repeat (str) markers has more potential for high throughput diagnosis. marker heterozygosity in short tandem repeats (str) is ...

An achromatic element eliminating only longitudinal chromatic aberration (LCA) while maintaining transverse chromatic aberration (TCA) is established for the eye model, which involves the angle formed by the visual and optical axis. To investigate the impacts of higher-order aberrations on vision, the actual data of higher-order aberrations of human eyes with three typical levels are introduced...