View clinical trials related to Cataract.
Filter by:Retrospective chart review of patients with pre-existing ocular pathology who underwent cataract surgery with implantation of the Symfony IOL.
Phacoemulsificaton tip elongation depends upon voltage once resonant frequency of piezoelectric crystals has been reached. Purpose of the study is to record voltage data of 20 consecutive cataract surgeries in order to evaluate correlation between voltage and LOCS classification of lens nuclei using a system that deploys a feedback mechanism capable of keeping invariant elongation regardless of enountered resistence
To assess the safety and effectiveness of treatment with an intracanalicular dexamethasone (0.4mg) insert in the operating room following cataract surgery/intraocular lens implant (IOL) compared to insertion 1-day post-op.
The IOL-capsular complex is formed after cataract surgery and intraocular lens (IOL) implantation.Early postoperative mechanical wrapping of the anterior and posterior capsules plays a significant role in preventing IOL decentration and tilt, as well as formation of the IOL-capsular complex which reduces the incidence of posterior cataract opacity. Capsular tension rings were first introduced in the early 1990s for loosening and tightening the lens bag and maintaining the equatorial contour of the bag after cataract surgery.Today, capsular tension rings of many different designs are in use.The capsular tension rings can be used in eyes with fragile and split zonular fibers, as well as pseudoexfoliation, high myopia, Marfan syndrome, mature cataract and lens subluxation.The capsular tension ring reduces the incidence of decentration and tilt of the IOL by reducing capsular contraction. In addition, multi-focus IOL implantation combine with capsular tension ring result in smaller high-order aberrations in our eyes compared to cataract surgery with multi-focus IOL implantation alone.For patients with high myopia, they often have a longer axial length and a larger capsule diameter, which reduces the rotational stability of the IOL and may lead to tilt ,decentration and displacement of IOL.Currently, there is no literature guidance to compare the results of cataract surgery combined with or without capsular tension ring implantation in patients with high myopia.Our hospital has Swept-source Optical Coherence Tomography ( SS-OCT,Casia2, TOMEY, Japan), which can accurately photograph the process of IOL capsule bending and the changes of lens position after cataract surgery. SS-OCT can be used to evaluate the influence of capsular tension ring on the dynamic changes of IOL-capsular complex in patients with high myopia after cataract surgery.
This is a prospective and retrospective, single-center, single-arm, open-label clinical study of the TECNIS Synergy™ IOL. The study will enroll up to 100 subjects from a single site in China. All implanted subjects will be followed for 12 months postoperatively.
This is a prospective and retrospective, single-center, single-arm, open-label clinical study of the TECNIS Eyhance™ IOL. The study will enroll up to 100 subjects from a single site in China. All subjects will be followed for 12 months postoperatively.
This study is a 6-month, prospective, comparative, multicenter, bilateral, parallel group, randomized (2:1), subject/evaluator masked clinical investigation of the investigational mDCB00 IOL as compared to the DCB00 IOL. The study will be conducted at up to 8 sites in countries where both the investigational and control lenses are approved for market and/or for evaluation in a clinical study and will include a total of up to 200 subjects. Subjects will be randomly assigned to receive either the test lens or the control lens in both eyes.
Digital 3D microscopes require less light and may be more comfortable for patients requiring cataract surgery under topical anesthesia compared to conventional microscopes. To date, no studies have evaluated the comfort and subjective visual sensations related to the light of the 3D digital microscope in cataract surgery patients. The purpose of this study is to evaluate the effectiveness of the Ngenuity 3D digital operating system (Alcon, Fort Worth, TX) compared to conventional microscopes on the comfort and subjective visual sensations related to of patients undergoing initial cataract surgery under topical anesthesia (pure or combined with intravenous sedation).
Cataract is currently the leading cause of visual impairment worldwide with age being the most common cause of lenticular opacification. As cataract surgery is the most commonly performed elective surgery worldwide, forecasts of an increasing number of elderly individuals make it clear that efficient and evidence based models for managing cataract in the future need to be implemented to manage the broadening gap between intervention and available resources. Bilateral cataract is currently treated using same day separate surgical procedures (immediate sequential bilateral cataract surgery (ISBCS) or on separate days (delayed sequential bilateral cataract surgery (DSBCS). Whether one approach is more ideal than the other is an ongoing debate. There is, however, a clear advantage of same day surgery on resource management. The primary purpose of this clinical study is to measure the patient reported satisfaction regarding vision in a group of 300 participants following either same day or delayed bilateral cataract surgery.
This study is a 3-month, prospective, up to 2 center, bilateral, randomized subject masked clinical evaluation of a monofocal intraocular lens (IOL) when both eyes are targeted for emmetropia and when the non-dominant eye is targeted for mini monovision (-0.75 D) in patients with or without astigmatism undergoing routine cataract surgery.