purpose : to evaluate distance and near contrast sensitivity (cs) under photopic and mesopic conditions before and after refractive lens exchange (rle) and implantation of the aspheric acrysof restor (sn6ad3 model) intraocular lens (iol) methods : sixty eyes of 30 consecutive patients after rle underwent bilateral implantation with the aspheric acrysof restor iol. the patients sample was divide...

INTRODUCTION Potential indications for excimer laser procedures in children include accommodative esotropia, bilateral high ametropia, and severe anisometropia. Treatment of these conditions has traditionally included spectacle or contact lens use. This treatment, however, is often ineffective in children with severe anisometropia or bilateral ametropia, especially those with neuropsychological...

purpose: to evaluate the predictability, efficacy, and safety of iris-claw artisanô phakic intraocular lenses ­for myopia. methods: through a prospective clinical study, 35 eyes of 21 patients with myopia from -5 to 26.5 diopters underwent implantation of the artisan lens. patients were examined 1, 3, and 7 days (all eyes); 1 month (28 eyes), 3 months (29 eyes), and 6 months (32 eyes) after the...

purpose: to describe a case with a rare complication of posterior chamber intraocular lens (pc-iol) implantation in a patient who had undergone extracapsular cataract extraction (ecce) two years before case report: a 80-year-old diabetic woman presented with an exposed pc-iol in her left eye with a history of mechanical trauma. slit-lamp examination revealed an extruded pc-iol lied on the anter...

Current head-mounted displays (HMDs) provide only a fixed lens focus. Viewers have to decouple their accommodation and vergence responses when viewing stereoscopic images presented on an HMD. This study investigates the time taken to fuse a pair of stereoscopic images displayed on an HMD when the accommodative demand is matched to the vergence demand. Four testing conditions exhausting the fact...

PURPOSE To profile accommodative biometric changes longitudinally and to determine the influence of age-related ocular structural changes on the accommodative response prior to the onset of presbyopia. METHODS Twenty participants (aged 34-41 years) were reviewed at six-monthly intervals over two and a half years. At each visit, ocular biometry was measured with the LenStar biometer (www.Haag-...

PURPOSE To explore the attachments of the posterior zonule and vitreous in relation to accommodation and presbyopia in monkeys and humans. METHODS Novel scanning electron microscopy (SEM) and ultrasound biomicroscopy (UBM) techniques were used to visualize the anterior, intermediate, and posterior vitreous zonule and their connections to the ciliary body, vitreous membrane, lens capsule, and ...

Accommodative lags, induced by a target at 33 cm (distance-induced condition) and by a -3.0 D lens (lens-induced condition), and wavefront aberrations were measured in 27 young myopic eyes. The accommodative lags and Strehl ratios derived from the wavefront aberrations in myopes were compared with those from 57 emmetropes. Accommodation was measured using a Canon R-1 autorefractor, while aberra...

Purpose: To provide a summary of the most recent evidence-based data on the paediatric refractive surgery. Methods: A review of the published studies from 1990 to 2015 was undertaken with emphasis on recent articles from 2010 to 2015. Results: Searching Scopus and PubMed, using the keywords of refractive surgery, phakic, paediatric, IOL, children and amblyopia alone or in various combinations y...