This study deals with the analysis of wavefront aberrations that occur in the image owing to curvature variations in the human eye cornea. The analysis is based on the Liou-Brennan human eye model. The surface curvature and wavefront aberrations are described using Zernike polynomials. Our approach involves evaluating parameters of the distorting system's transfer function and measuring the exp...

PURPOSE To evaluate changes induced by standard laser in situ keratomileusis (LASIK) for hyperopia on total and corneal optical quality. METHODS Total and corneal aberrations were measured before and after standard hyperopic LASIK in 13 eyes (preoperative spherical equivalent refractive error +3.17 +/- 1.10 D). The Chiron Technolas 217C laser with PlanoScan was used. Total aberrations (measur...

PURPOSE To describe monochromatic optical aberrations of the eye as a function of age. METHODS One hundred fourteen subjects with a spherical equivalent within +/-3.50 D from emmetropia, corrected visual acuity of 20/40 or better, and normal findings in an ophthalmic examination were enrolled. The mean age was 43.2 +/- 24.5 years (range, 5.7-82.3). Monochromatic optical aberrations were measu...

Three-dimensional (3D) direct laser writing is a powerful technology to create nano- and microscopic optical devices. While the design freedom of this offers possibility reduce different monochromatic aberrations, reducing chromatic aberrations often neglected. In Letter, we successfully demonstrate combination refractive diffractive surfaces refractive/diffractive achromat show, best our knowl...

The intrinsic aberrations of high-NA gradient refractive index (GRIN) lenses limit their image quality as well as field of view. Here we used a pupil-segmentation-based adaptive optical approach to correct the inherent aberrations in a two-photon fluorescence endoscope utilizing a 0.8 NA GRIN lens. By correcting the field-dependent aberrations, we recovered diffraction-limited performance acros...

Achromatic doublets have been used for decades to minimize the effects of chromatic aberrations inherent to single-glass optical lenses. Here, we propose a fundamentally different solution to correct the chromatic aberrations based on a nanowire metamaterial with low loss anomalous dispersion. We show that by coating a standard glass lens with the metamaterial it may be possible to design a com...

For an airborne optical system carried by a helicopter, aero-optic aberrations originate primarily from blade tip vortices that pass through the system field of view; these aberrations result from the reduced pressure and density in the vortex cores and the associated variations in the index-of-refraction. Using the weakly compressible model (WCM) previously developed at Notre Dame, aero-optic ...

BACKGROUND Migraine is a multifactorial disorder with complex neuronal and vascular mechanisms that encompasses a wide clinical spectrum of symptoms, including ocular manifestations. Dry eye disease and dysfunction of ocular somatosensory pathways have been implicated in the pathogenesis. The current study investigates the association between a dysfunctional tear film and ocular aberrations wit...

When the deterministic aberrations are known in an optical system, traditional de-blurring methods are effective . However, when the aberrations are difficult to quantify, such as telescope aberrations or the aberrations in the human eye, other methods are needed . One potential method for de-blurring an image that is formed from a system with unknown aberrations is the bispectral imaging metho...