View clinical trials related to Cataract.
Filter by:This study evaluates the safety and effectiveness of a capsular tension ring (CTR) when used during cataract surgery. Capsular Tension Rings are used during intraocular lens implantation to give added support in order to keep the intraocular lens well centered, especially in eyes with weak or partially absent zonules. In many cases, capsular tension rings allow a lens to be successfully implanted into an eye which otherwise could not have supported an intraocular lens.
The primary objective of this study is to assess the efficacy and safety of 2 concentrations of RX-10045 ophthalmic solution, 0.05% and 0.1%, compared to placebo for the treatment of ocular inflammation and pain in subjects undergoing cataract surgery.
Toric intraocular lens (IOL) is now widely used for the cataract surgery with preoperative corneal astigmatism. Symptomatic epiretinal membrane (ERM) is often treated with 25-gauge transconjunctival sutureless vitrectomy, resulting in good visual recovery. So far, however, limited information is available on the the stability of axis rotation, astigmatism correction, and improvement in uncorrected distance visual acuity, using astigmatism-correcting IOL in a 25-gauge transconjunctival sutureless vitrectomy combined with cataract surgery. In the current study, eyes with a preoperative corneal cylinder of more than 0.75 diopter had a triple procedure for idiopathic ERM using a toric IOL. Outcome measures will be the amount of IOL axis rotation, uncorrected visual acuity, corrected distance visual acuity, and corneal and refractive astigmatism up to 6 months postoperatively. We are expecting to show that postoperative IOL axis stability is similar to that reported for cataract surgery alone in vitrectomy (triple procedure) for idiopathic ERM with a toric IOL.
The objective of this study is to assess the visual outcome after the combined binocular implantation of +2.5 D and +3.0 D apodized diffractive multifocal intraocular lenses.
Objective: To compare intraocular pressure lowering effect of combined sclerotomy ab interno with phacoemulsification and phacoemulsification alone, in primary or secondary open angle glaucoma patients. Study design: Prospective, randomized, case- control interventional surgical trial
The cataract surgery (550 000 operations per year in France) is to replace the cloudy lens with a refractive implant. Two colors of implants are available: white implants, filtering out ultraviolet and yellow implants, filtering and more blue light. No clinical data are available to assert the superiority of an implant according to its color and the choice is made according to the preference of the surgeon and / or "markets". It is established in humans that blue light has an important role on the secretion of melanopsin, a key mediator of the circadian cycle. This "clock" regulates most neuroendocrine functions in the nycthémère (sleep, mood, temperature, cortisol, ..). The question of the impact of these neuro endocrine functions of the installation of a blue light filter into the eyes of patients operated thus arises.
Objective of this study is the comparative assessment of the beneficial impact of the Viscoat viscoelastic (OVD) and Visthesia OVD on endothelial cells and corneal edema following torsional-ip cataract extraction surgery. Participants will be recruited from the Cataract Service of the University Hospital of Alexandroupolis (UHA) in a consecutive-if-eligible basis. Eligibility criteria include diagnosis of senile cataract with stage 3 nuclear opalescence according to the Lens Opacities Classification System III (LOCS-3) grading scale. By means of a custom computer randomization program all participants will randomly populate two study groups according to the OVD used (ie. viscoat or visthesia).
The overall objective is to determine the visual outcomes and cost to perform Manual Small Incision Cataract Surgery (MSICS) in a small cohort at an academic medical center in the United States. The primary outcome measure will be the percentage of the study group achieving a post operative visual acuity 20/40 Snellen. This percentage will be compared to historical cohorts reported for phacoemulsification cataract surgery (PCS), when performed in academic centers. A secondary outcome will be to determine the actual institutional cost of providing MSICS in the setting of an academic medical center. The hypothesis is that MSICS is appropriate for a teaching environment (as evidenced by a comparable rate of 20/40 acuity or better at 90 days post op, as compared to PCS), and can be provided at a cost that makes visual rehabilitation affordable to the uninsured and underinsured.
Prediction errors for the first (PE1) and second eyes (PE2) were obtained in the intra-ocular lens power calculation for 4 formulae (HofferQ, SRK II, SRK/T and Holladay 1). The optimal correction factor for each formula was determined as the one resulting in the lowest mean absolute error. A similar analysis was performed in the negative and positive PE1 subgroups.
During cataract surgery an artificial lens is implanted in the eye. These artificial lenses are called intraocular lenses (IOLs) and there are many different types of IOL designs. Your eyes have astigmatism, which is a normal and common characteristic of the eye. If left uncorrected the astigmatism would mean that you would need to wear spectacles for viewing distance objects. New IOL designs called toric IOLs help to correct the astigmatism to improve your vision after cataract surgery. This study has been designed to look at how well a toric IOL corrects this astigmatism so that you do not need to wear spectacles for viewing distance objects. There are many designs of these toric IOLs and for this study we are looking to compare two different designs of toric IOLs by putting one lens in your right eye and a different type of lens in your left eye. Both lenses are commercially available and are commonly implanted IOLs. Using new non-invasive methods we hope to be able to better judge the visual performance of these lenses and the ability of these lenses to correct astigmatism. In addition the study will involve imaging and examining the IOLs to determine the prevalence of any post-operative complications.