Keratoconic eyes are affected by an irregular optical blur induced by significant magnitude of higher order aberrations (HOAs). Although it is expected that correction of ocular aberrations leads to an improvement in visual performance, keratoconic eyes might not achieve the visual benefit predicted by optical theory because of long-term adaptation to poor retinal image quality. To investigate ...

The monochromatic optical aberrations of the eye degrade retinal image quality. Any significant aberrations during postnatal development could contribute to infants' immature visual performance and provide signals for the control of eye growth. Aberrations of human infant eyes from 5 to 7 weeks old were compared with those of adult subjects using a model of an adultlike infant eye that accounte...

Purpose. To evaluate decentration following femtosecond laser small incision lenticule extraction (SMILE) and sub-Bowman keratomileusis (SBK) and its impact on higher-order aberrations (HOAs). Methods. Prospective, nonrandom, and comparison study. There were 96 eyes of 52 patients who received SMILE and 96 eyes of 49 patients who received SBK in this study. Decentration was calculated 6 months ...

BACKGROUND The aim of the present study was to investigate the effect of near-work on lower and higher-order aberrations, and its progression over a 9-month period during the school year. METHODS Data from 24 young-adult myopic eyes, and 24 non-myopic eyes were used in this investigation. The lower-order aberrations, coma, spherical aberration (SA), and total root mean square (RMS) of higher ...

We investigated differences in higher order monochromatic aberrations between hyperopic and emmetropic eyes from two large cohorts (mostly 6 and 12 year old) of Caucasian children. Additionally, we investigated the differences of higher order monochromatic aberrations between age groups. In both cohorts, hyperopic eyes had significantly higher levels of positive spherical aberration (SA) and hi...

The impact of intraocular scatter and higher order aberrations (HOAs) on ocular optical quality was investigated. An eye model constructed using the measured aberrations, corneal surfaces, axial length, fraction, HOAs modulation transfer functions (MTFs) studied based newly established model. For uniform scatter, monochromatic polychromatic MTF decreased as or fractions increased independently ...

INTRODUCTION wavefront sensing technology has emerged as a means to advance our understanding of high-order aberrations of the human eye. PURPOSE to evaluate the differences in ocular high-order aberrations between males and females and the distribution of high-order aberrations in males and females. SUBJECTS AND METHODS 3,597 eyes (1,029 female and 2,568 male) of 1,874 patients who obtaine...

Excimer laser refractive surgery aims to correct lower order eye aberrations such as myopia, astigmatism and hyperopia by altering the shape of the corneal curvature through the ablation of corneal tissue. Early excimer systems were associated with concerns over post-operative complications, such as night-time driving problems, glare and halos. Furthermore, it was difficult to prevent or treat ...

PURPOSE To compare the astigmatism, high order aberrations, and optical quality of the cornea after microincision (approximately 1.7 mm) versus small incision approximately 3.2 mm) cataract surgery at Eye Center, Zhejiang University, Hangzhou, China. METHODS This prospective, randomized clinical study included microincision cataract surgery and small incision cataract surgery performed on 60 ...

When performing in vivo imaging of live samples, it is a big challenge to penetrate thick tissues while still maintaining high resolution and large field view because the sample-induced aberrations. These requirements can be met by combining benefits two-photon excitation, beam modulation adaptive optics an illumination path. However, relationship between aberrations performance such microscopy...