View clinical trials related to Cataract.
Filter by:Congenital cataracts (CC) are the leading cause of childhood visual disabilities and treatable childhood blindness worldwide1. CC patients have a wide range of presentations of lens opacities and are generally categorized into several groups based on the etiologies, anatomical positions, or shapes of lens opacities. Cataractous eyes of CC patients are also frequently complicated with other anterior segment abnormalities due to their close anatomical relationships and similar developmental origins. Lens opacities in different positions may be related to specific anterior segment abnormalities; for example, anterior polar cataracts are associated with greater corneal astigmatism (CA). However, no studies have systematically related the position of lens opacities to specific anterior segment abnormities, mainly due to the small number of CC patients, a lack of proper equipment, and a lack of awareness of these important relationships.
Loteprednol Etabonate Ophthalmic Gel, (BID and TID) versus Vehicle Group for the Treatment of Ocular Inflammation and Pain Following Cataract Surgery.
The purpose of this study is to compare the safety and efficacy of goniotomy performed with a novel ophthalmic knife compared to trabecular bypass stent implantation in mild to moderate glaucoma subjects who are also undergoing cataract extraction with phacoemulsification (Phaco) and posterior chamber intraocular lens (PCIOL) implant.
This study evaluates the association between surgery of the cataract and posterior vitreous detachment, in the emmetropic patient, by comparing eyes operated with eyes not operated in the same group of patients
Prospective, multicenter, paired-eye, randomized, masked, clinical trial of the bacterially-derived Healon5 OVD versus the currently available Healon5 OVD control.
Prior to cataract surgery the lens must be calculated to appropriately fit a patient for the intraocular lens implant. Lenstar is an optical biometer that calculates the axial length, keratometry, lens thickness, pupillometry, and anterior chamber depth. Dilation drops are routinely used in eye exams in addition to pre-cataract surgery. The dilation drops include Tropicamide 1%, and Phenylephrine 2.5%. The Tropicamide achieves the dilation of the pupil which causes an anterior rotation of the ciliary body, which may affect the Lenstar measurements. This study is to determine if dilating medications affect the lens power prediction for emmetropia by the Lenstar biometer. Prior to dilation, Lenstar biometry will be performed on each eye. Patients will receive dilation medication and after waiting 20 minutes Lenstar biometry will be performed on each eye. Dilation and measurement with Lenstar will be done as standard of care. Measurements and calculations from before and after will be compared.
Controversies exist about the use of propofol in sedation of patients for cataract surgery. This prospective randomised double-blind study evaluates the efficacy of patient-controlled sedation compared with placebo using the same device.
The aim of this study is to evaluate the visual function of patients with bilateral implantation of the IOL trifocal ZEISS AT LISA TRI AND TRI TORIC by means of visual acuity tests with and without optical correction, sensitivity curve contrast, defocus curve and quality questionnaire visual function (VFQ-25).
Prospective study to evaluate the efficacy of using self-retained cryopreserved amniotic membrane after debridement in treating Epithelial Base Membrane Dystrophy (EBMD) to optimize the ocular surface integrity and intraocular lens calculation before cataract surgery.
The purpose of this cross-sectional study is to compare bilateral anterior segment parameters, macular thickness, and BCVA at 3 months after uncomplicated unilateral pediatric cataract extraction with primary IOL implantation to explore any possible interocular differences and their possible relationships.