implantation of intraocular lens with iris-fixation is a safe, efficient and predictable surgical procedure, which empowers the refractive surgeon with singular capabilities. among their advantages are the reversibility, preservation of accommodation and a broad spectrum of ametropic correction. this lens also appears to be a valid option, with a favorable complication rate, for the treatment o...

Background: Optometric practice goes beyond the diagnosis and treatment of the different refractive conditions and eye diseases. It includes an evaluation of information processing skills that depend, in some way, on supramodal processing stability. This involves simultaneous and sequential or successive processing. Cerebral function allows for normal perception of what is being seen; any defic...

BACKGROUND The PlusOptix photoscreeners (PlusOptix GmbH, Nuremberg, Germany) is used in many vision screening programs. The purpose of the present study was to further explore the accuracy of the PlusOptix A09 photoscreener in children with ametropia (myopia or hyperopia). METHODS A total of 70 eyes (35 children) were prospectively included. Before administration with the cycloplegia treatmen...

PURPOSE To examine the effects of refractive error on avian lens morphology and optical quality. METHODS Hatchling white leghorn chicks were unilaterally goggled for 7 days with either a form-deprivation goggle (n = 12), a -10 D defocus goggle (n = 12), or a +10 D defocus goggle (n = 12) to induce myopia and hyperopia. Optical quality of lenses (focal length and focal length variability) from...

Introduction Hydroxyethylmethacrylate (HEMA) is a hydrop~ylic absorpt1ve hydrogel of good mechanical strength which can, in the dehydrated state, he la;the cut to accura'te dimensioIlls and then rehydrated to form a softconta,et Jens of excellent optical properties. Lenses intended for correction .of ametropia (usually myopia) have a water content of 30 per cent to 40 percent hut the ma:terial ...

A series of 50 eyes received an intraocular lens (IOL) of power calculated for emmetropia from data of axial length, corneal curvature, and postoperative anterior chamber depth by R. D. Binkhorst's formulae. The postoperative refraction results were compared with those of 100 control eyes which received +19 D standard power IOLs without calculation. The calculated group had postoperative refrac...

Introduction: Refractive disturbances have been observed during hyperglycemia. However, there remains controversy as to the types of that it induces. Objective: To determine refractive hyperglycemia in humans. Population and Methods: This was an observational cross-sectional study with analytical purpose conducted from July November 2021. Emmetropia, hypermetropia, myopia well blood glucose lev...

AIMS In order to establish normal values and interocular differences of visual acuity, Lea symbols were applied to neurologically and ophthalmologically normal children. METHODS 385 children (21-93 months old) were examined, within a routine check up in an urban paediatric practice where Lea symbol acuity (LS) was measured. Of these children, 90 were re-examined in hospital comparing Lea symb...

PURPOSE The purpose of this study is to develop and analyze a method to obtain optical schematic models of individual eyes. Each model should be able to reproduce the measured monochromatic wave aberration with high fidelity. METHODS First, we choose a generic eye model as the input guess and then apply a two-stage customization procedure. Stage 1 consists of replacing, in the initial generic...

When retinopathy of prematurity regresses, as it does in most cases, these children are typically reevaluated several months later. If a cycloplegic refraction is normal, there is a wide variety of practice patterns to address when these children should be reexamined. An unanswered question is whether the children remain at high risk of developing significant refractive errors. In this issue, M...