Objective: To evaluate effects of previous myopic laser in-situ keratomileusis (LASIK) on decrease in contrast sensitivity after implantation of diffractive multifocal intraocular lens (MF-IOL). Methods: Retrospective case series included eyes that were implanted diffractive MF-IOLs after myopic LASIK. Contrast sensitivity was measured 1 month postoperatively and the area under log contrast sen...

PURPOSE To assess optical coherence tomography (OCT) for diagnosing posterior vitreous detachment (PVD) at the macular region compared to kinetic B-scan ultrasonography. METHODS In the present study, the authors prospectively investigated the frequency of PVD at the posterior pole utilizing ocular kinetic B-mode sonography in 315 eyes of 188 patients (113 female, 75 male; mean age, 72.8 years...

PURPOSE To assess the effectiveness, safety, and comfort of transepithelial photorefractive keratectomy (PRK) using the Amaris laser platform. SETTING Ophthalmic Consultants of Beirut, Jal-El-Dib, Metn, Lebanon. DESIGN Comparative case series. METHODS Myopic eyes with or without astigmatism were treated by transepithelial PRK (study group) and compared with variable-adjusted eyes treated ...

The Central American hunting spider Cupiennius salei Keys relies mainly on its mechanosensory systems during prey-catching and mating behaviour. The behavioural relevance of its eight eyes has not been studied before, although their optics and sensitivity suggest highly developed visual capabilities. The visual system was examined in a twofold simultaneous-choice experiment. Two targets were pr...

PURPOSE To evaluate mesopic visual acuity and visual quality as measured by objective scatter index (OSI) in pseudophakic eyes with long-term follow-up after implantation of hydrophobic acrylic lenses made from two different lens materials. SETTING This study was carried out in a private clinic. DESIGN This study was an observational cohort study. METHODS This pilot study included 181 eye...

This cross-sectional exploratory study aimed to compare the one-leg-stance time and the six-minute walk distance among TC Qigong-trained NPC survivors, untrained NPC survivors, and healthy individuals. Twenty-five survivors of NPC with TC Qigong experience, 27 survivors of NPC without TC Qigong experience, and 68 healthy individuals formed the NPC-TC Qigong group, NPC-control group, and healthy...

PURPOSE An earlier study suggested that deficits of vergence can influence postural control via the efferent and afferent proprioceptive signals. In this study, postural control in 28 children with vertigo with normal vestibular function but with vergence abnormalities and in 19 normal children of comparable age was assessed with orthoptic tests. METHODS A posturography platform was used to e...

Stereoscopic 3D (S3D) displays provide an additional sense of depth compared to non-stereoscopic displays by sending slightly different images to the two eyes. But conventional S3D displays do not reproduce all natural depth cues. In particular, focus cues are incorrect causing mismatches between accommodation and vergence: The eyes must accommodate to the display screen to create sharp retinal...

PURPOSE To compare femtosecond lenticule extraction and small-incision lenticule extraction to treat moderate to high myopia. SETTING Department of Ophthalmology, Aarhus University Hospital, Aarhus, Denmark. DESIGN Prospective clinical single-masked paired-eye study. METHODS An intrastromal lenticule was cut by a femtosecond laser and manually extracted. In femtosecond lenticule extractio...

PURPOSE A preliminary study to evaluate the outcomes of high-resolution wavefront-guided (HRWG) photorefractive keratectomy (PRK) with simultaneous corneal cross-linking (CXL) in ectasia eyes. METHODS Sixteen eyes of 11 patients (mean age 31.9±9.8 years; range: 15-48 years) with keratoconus or post-laser-assisted in situ keratomileusis ectasia underwent HRWG PRK with simultaneous CXL. Manifes...