We read with interest the article by Kung and Manche in the April 2016 issue.1 In the first part of the article, they explained that most studies seemed to suggest that the wavefront-guided excimer laser procedures were slightly superior than wavefront-optimized approaches, particularly in patients with preoperative root mean square (RMS) of higher order aberrations (HOAs) less than 0.3 μm. How...

PURPOSE Standard evaluation of aberrations from wavefront slope measurements in patients implanted with a rotationally asymmetric multifocal intraocular lens (IOL), the Lentis Mplus (Oculentis GmbH, Berlin, Germany), results in large magnitude primary vertical coma, which is attributed to the intrinsic IOL design. The new proposed method analyzes aberrometry data, allowing disentangling the IOL...

Aim. To evaluate the acute effects of cigarette smoking on photopic and mesopic pupil sizes and wavefront aberrations. Methods. Cigarette smoker volunteers were recruited in the study. Photopic and mesopic pupil sizes and total ocular aberrations were measured before smoking and immediately after smoking. All volunteers were asked to smoke a single cigarette containing 1.0 mg nicotine. Pupil si...

High order aberrations have been suggested to play a role in determining the direction of accommodation. We have explored the effect of retinal blur induced by high order aberrations on dynamic accommodation by measuring the accommodative response to sinusoidal variations in accommodative demand (1-3D). The targets were blurred with 0.3 and 1mum (for a 3-mm pupil) of defocus, coma, trefoil and ...

We investigate the potential for the third-order aberrations coma and trefoil to provide a signed cue to accommodation. It is first demonstrated theoretically (with some assumptions) that the point spread function is insensitive to the sign of spherical defocus in the presence of odd-order aberrations. In an experimental investigation, the accommodation response to a sinusoidal change in vergen...

Although the ocular higher order aberrations degrade the retinal image substantially, most studies have investigated their effect on vision only under monocular conditions. Here, we have investigated the impact of binocular higher order aberration correction on visual performance and binocular summation by constructing a binocular adaptive optics (AO) vision simulator. Binocular monochromatic a...

PURPOSE The primary objective of the study was to explore the statistics of ocular higher-order aberrations in a population of primary and secondary school children. METHODS A sample of 557 children aged 10-15 years were selected from two primary and two secondary schools in Heraklion, Greece. Children were classified by age in three subgroups: group I (10.7±0.5 years), group II (12.4±0.5 yea...

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...

Purpose: To investigate the effect of newly designed photochromic Senofilcon-A lens(PCL) on optical aberrations eye (total (TA) and high-order-aberrations (HOA)) under ambient illumination conditions.
 Methods: In this retrospective study, 40 eyes 20 volunteers were fitted with a non-photochromic contact lens right eye, PCL left eye. Subjects evaluated in terms best-corrected visual-acuity...

Context. The combination of large segmented space telescopes, coronagraphy, and wavefront control methods is a promising solution for producing dark hole (DH) region in the coronagraphic image an observed star order to study planetary companions. thermal mechanical evolution such high-contrast instrumental setup leads drifts that degrade DH contrast during observing time, thus limiting ability ...