View clinical trials related to Lens Implantation, Intraocular.
Filter by:Since intermediate vision is becoming increasingly important in our day-to-day tasks, a new IOL was introduced (Acunex Vario) with this objective in mind. This IOL provides excellent vision at far and intermediate distances up to 60 cm and with negligible photopic disturbances compared to conventional multifocal lenses. The Alcon AcrySof IQ Vivity IOL is designed to provide continuous vision from distance to intermediate while preserving contrast sensitivity and with a monofocal visual disturbance profile. So far, there are no published studies comparing these new IOL designs that offer an extended range of vision at far and intermediate distances. Objective: The primary objective of this study is to compare the binocular uncorrected intermediate visual acuity (UIVA) at 66 cm under photopic conditions 3 months postoperatively, in a series of patients bilaterally implanted with the Vario IOL versus those bilaterally implanted with the Vivity IOL. Study design: controlled double masked, randomized, prospective clinical trial Study population: patients of 18 years or older with bilateral cataracts that require cataract surgery. Intervention: One group receives bilateral implantation with the Vario IOL and the other group receives bilateral implantation with the Vivity IOL. Main study parameters: The main study parameter is the binocular UIVA at 66 cm under photopic conditions at 3 months postoperatively. Hypothesis: The investigators hypothesise that bilateral implantation with the Vario IOL is non-inferior when compared to bilateral implantation with the Vivity IOL, with regards to binocular UIVA at 66 cm under photopic conditions 3 months postoperatively. Cataract extraction in this study will proceed according to regular cataract surgery. As with any type of intraocular surgery, there is a possibility of complications due to anesthesia, drug reactions, and surgical problems. Postoperatively, there will be one extra postoperative visit, compared to standard cataract surgery follow-up. Spectacle-independency postoperatively, without photopic phenomena, is one of the major expected benefits when treating cataract (and presbyopia) with the implantation of the Vario or Vivity IOLs.
To observe the retinal microvascular alteration during 3 months follow-up after Implantable Collamer Lens (ICL) operation in moderate and high myopia patients using quantitative optical coherence tomography angiography (OCTA) analysis.
Purpose: To determine whether implantation of an intraocular lens (IOL) with a modified anterior and posterior aspherical surface (Akreos AO, Bausch & Lomb,Inc) results in reduced ocular aberrations (spherical aberration) and in improved contrast sensitivity after cataract surgery. Study hypothesis: the implantation of an intraocular lens (IOL) with a modified anterior and posterior aspherical surface (Akreos AO, Bausch & Lomb,Inc) results in reduced ocular aberrations (spherical aberration) and improved contrast sensitivity after cataract surgery. Setting: Department of ophthalmology, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil. Overall Study design: This will be an intraindividual randomized double-blinded prospective study. Patients will be randomized to receive an aspheric IOL Akreos AO in one eye (25 eyes; Bausch & Lomb, Inc), and an spheric IOL Akreos Fit (25 eyes; Bausch & Lomb, Inc.) in the fellow eye. Ocular aberrations with a 5.0 mm and 6.0 mm pupil will be measured with a dynamic retinoscopy aberrometer after 1 and 3 months. Uncorrected and best-corrected visual acuity, out-focus performance and contrast sensitivity under mesopic and photopic conditions will be also measured. All patients will be followed for 3 months.