PURPOSE The visual performance of pseudophakic eyes depends on the type of intraocular lenses (IOLs) that are implanted. Aspherical and multifocal IOLs have recently been developed to improve visual quality after cataract surgery, but multifocal IOLs can be associated with decreased contrast sensitivity (CS), halos, and glare. This study compares the visual performance of monofocal and multifoc...

PURPOSE To determine if model eyes can simulate the visual performance of normal human eyes under conditions of varying low myopic blur, pupil size, and contrast. METHODS High and low contrast Bailey-Lovie logMAR visual acuity (VA) of three normal eyes of three subjects were measured for four artificial pupil sizes and ten levels of myopic defocus. Simulated visual acuities were then determin...

The resolution of a scanning transmission electron microscope remains 100 times worse than its theoretical limit owing to the spherical aberration of objective lens. Ikuta proposed a system to generate an aberration-free amplitude image and phase image using multiple small detectors with real-time signal processing. This study shows the performance optimization results of its signal processing ...

In this study, the wave-front aberrations of medium and high myopia with different CCT after SMILE were studied by finite element method. Then, various trend clinical significance was obtained. When same, diopters different. increased, variations However, regardless degree myopia, defocus primary spherical aberration most obvious. The larger CCT, smaller absolute values aberration.

PURPOSE To compare visual acuity, total and high order wavefront aberrations (coma, spherical aberration, and other terms of high order aberration), and contrast sensitivity in 105 eyes implanted with 4 different types of intraocular lenses (IOLs) (1 multifocal apodized diffractive IOL and 3 monofocal IOLs). METHODS A prospective study comparing four types of IOLs (Alcon ReSTOR [50 eyes], Alc...

Recently, joint analysis and optimization of both the optical sub-system and the algorithmic capabilities of digital processing have created new digital-optical imaging systems with system-level benefits. We explore a special class of digital-optical imaging systems called spherical coding that combine lens systems having controlled amounts of spherical aberration with digital sharpening filter...

A computational study of line-focus generation was done using a self-written ray-tracing code and compared to experimental data. Two line-focusing geometries were compared, i.e., either exploiting the sagittal astigmatism of a tilted spherical mirror or using the spherical aberration of an off-axis-illuminated spherical mirror. Line focusing by means of astigmatism or spherical aberration showe...

PURPOSE This study was performed to elucidate the correlation between added lens refill material and enhanced lens power as well as the correlation between lens refilling volume and accommodative amplitude as determined by equatorial stretching of ex vivo refilled pigs' lenses. METHODS Nine porcine lenses were refilled with increasing amounts of silicone oil. After each refill step, the lens ...

Our ability to see fine detail at depth in tissues is limited by scattering and other refractive characteristics of the tissue. For fixed tissue, we can limit scattering with a variety of clearing protocols. This allows us to see deeper but not necessarily clearer. Refractive aberrations caused by the bulk index of refraction of the tissue and its variations continue to limit our ability to see...