One-dimensional kinoform and prism refractive lenses with large aperture and high transmittance at 22 keV have been investigated. A 12.0 µm focus size (full width at half-maximum) and an effective aperture of 0.85 mm, at a focal length of 705 mm and 21.747 keV, were achieved.
Purpose: Changes in choroidal thickness (ChT) are proposed to predict myopia development but evidence is mixed. We investigated time courses of choroidal responses, following different types of dynamic artificial stimulation in chicks with and without spectacle lenses, as well as changes in retinal dopamine metabolism and expression of candidate genes.
Methods: Chicks were kept in an arena surrounded by computer monitors presenting dynamic checkerboard fields of small, medium and large size.
Introduction: Presbyopia, difficulty in seeing close-ups, affects a billion people globally. Mobile financial services (MFS) have been mandated since January 2021 for Bangladesh government social safety net payments, including old age allowance (OAA) and widow allowance (WA). We report the protocol for the Transforming Households with Refraction and Innovative Financial Technology randomised trial assessing the impact on the use of online banking of providing presbyopic safety net beneficiaries with reading glasses, and brief smartphone and mobile banking app training.
Background: Refractive target of low simple myopic astigmatism allows increased depth-of-focus and near visual performance in monofocal intraocular lens (IOL) implants. This study investigated the effect of astigmatism and its axis on distance and near visual acuity (VA), and near visual performance for the Thai alphabet using the Thai MNREAD chart.
Purpose: To report visual and refractive outcomes and intraoperative and postoperative complications after pars plana vitrectomy (PPV) with retropupillary implantation of an iris clip intraocular lens (IOL).
Methods: This is a retrospective case series of patients who underwent secondary retropupillary intraocular lens insertion combined with pars plana vitrectomy to treat aphakia secondary to a dislocated nucleus lens (group A); or IOL dislocation (group B). Patient demographics, preoperative visual and refractive outcomes, intraoperative factors, postoperative visual and refractive outcomes, and complications within the follow-up period ranging from 6 months up to 3 years postoperative, were recorded.
Purpose Of Review: To describe recent evidence regarding surgical techniques for secondary scleral fixation of intraocular lenses (IOLs), with attention to information most relevant to the surgical practice of vitreoretinal surgeons.
Recent Findings: Recent studies have reported favorable outcomes in patients treated with scleral fixation of IOLs using Gore-Tex suture and flanged intrascleral haptic fixation (ISHF). ISHF can be achieved using trocar-cannulas or double needle-based techniques.
