View clinical trials related to Cataract.
Filter by:The complicated schedules for administering topical steroid eye drops combined with forgetfulness and physical difficulties instilling the drops may compromise compliance; which in turn could increase the risk for secondary complications such as PME post-cataract surgery, especially in a high-risk diabetic population. Dextenza, a sustained- release steroid insert, could help preclude adherence difficulties and provide better bioavailability, being as effective as, or more effective than steroid drops in preventing PME. The aim of this study is to assess the incidence of PME in diabetic patients undergoing cataract surgery when comparing the Dextenza insert to topical prednisolone acetate 1% drops.
The aim of this study is to evaluate the outcome of capsular in children with cataract, and to explore potential preoperative structural clues for postoperative glaucoma. The investigators included children with cataract planning to have cataract surgery in our institute. Exclusion criteria were: a history of ocular trauma, a history of intraocular surgery, preoperative glaucoma, steroid use before surgery, a history of maternal rubella syndrome, chronic anterior uveitis, persistent fetal vasculature, ocular anomalies associated with an increased risk of glaucoma, unable to complete examinations. The investigators recorded age at surgery, gender and relevant ocular and systemic histories. All patients underwent slit lamp biomicroscopy, slit lamp adapted anterior segment photography.All patients were examined at 1 week, 1 month, 3 months, 6 months, 1 year, 18 months, and two years after surgery. Patients were followed for two years or until the development of severe VAO requiring Nd: YAG laser capsulotomy, whichever came first. The examinations consisted of visual acuity, IOP measurement by a Tonopen tonometer (Reichert, Inc., Seefeld, Germany), fundoscopy, an assessment by high-resolution digital retroillumination imaging (detailed protocol presented below).The primary outcomes were the areas of the posterior capsular opening at different postoperative follow-up visits and during operation.A paired T test was used to compare the areas of the PCO between the postoperative visits and baseline.
Adults who undergo cataract surgery will be questioned after surgery about the eventual pain they experienced, about their health history, personal treatment. If they accept to be included in the study we'll record different parameters related to the surgery: type of anesthesia, duration of surgery, machines used, unexpected events, particularities noticed by the surgeon, etc. There will be no unusual intervention, everything will be run exactly as if there was no study. No additional consultation needed.
Brief Summary: Age-related cataract is the main cause of impaired vision in the elderly population worldwide. In the UK, more than half of people who are over 65 years old have some cataract development in one or both eyes. The only treatment that can restore functional visual ability is cataract surgery where the opacified crystalline lens is removed by phacoemulsification and an artificial intraocular lens is implanted. It is estimated that around 10 million cataract operations are performed around the world each year. Cataract operations are generally very successful, with a low risk of serious complications. During the past two decades, cataract surgery underwent tremendous change and modernisation resulting in today's small incision phacoemulsification surgery and a safe technique with a short rehabilitation time for the patient. Traditional spherical monofocal intraocular lenses (IOLs) restore best-corrected vision and may lessen the need for spectacles. These IOLs correct only the spherical portion of the total refractive error and do not correct corneal astigmatism. Astigmatism is a visually disabling refractive error affecting the general population, especially those with cataract. At least 15% to 20% of cataract patients have 1.5 diopters (D) or more of corneal or refractive astigmatism. With increased patient expectations, the trend is not only to remove the cataract but also to address the problem of pre-existing astigmatism at the time of surgery. Surgical-induced astigmatism can be reduced by smaller incisions, i.e. microincision cataract surgery (MICS), which by definition is surgery performed through incisions smaller than 2.0 mm, reducing the need for suturing. This results in better corneal optical quality, thus improving visual outcomes. There are also other surgical options to correct preexisting astigmatism during cataract surgery like: selectively positioning of the phacoemulsification incision; astigmatic keratotomy with corneal or limbal relaxing incisions; excimer laser refractive procedures such as photorefractive keratectomy, laser in situ keratomileusis, and laser-assisted subepithelial keratectomy; or implanting pseudophakic toric posterior chamber intraocular lenses (IOLs). Toric IOLs have been shown to result in good visual and refractive outcomes. Combined with MICS, these IOLs can allow effective correction of cylindrical errors intraoperatively, improving visual quality and thus leading to spectacle independence. Plate haptic and loop haptic toric IOLs have been considered for about a decade but have been associated with postoperative rotational instability. Rotation of a toric lens from its intended orientation degrades its corrective power, with approximately 3.3% loss of cylindrical power for every degree off axis. A misorientation of approximately 30° negates the effectiveness of astigmatic correction, and a misorientation of more than 30° may induce additional astigmatism. Although some patients are asymptomatic despite induced astigmatism, others experience symptoms such as blurred or distorted vision, headache, fatigue, eyestrain, squinting, or eye discomfort. Thus, IOL orientation stability is an essential goal in toric IOL design. RATIONALE The purpose of this study is to assess and compare the axial IOL rotation and optical quality (refraction, visual acuity, decentration and tilt) and capsular bag reaction after micro-incision surgery with an IOL implantation in cataract patients - Acrysof SN60WF, Tecnis ZCB00 & Envista MX60 IOL
The purpose of this study is to examine the effect of Cequa treatment on the accuracy of pre-operative biometry and on corneal higher-order aberrations (HOAs) in cataract patients who have signs of dry eye disease.
To determine the incidence of glaucoma following bilateral congenital cataract removal and estimate the associated risk factors in a large cohort to provide guidance for clinical practice.
This study is a multi-center study, which collects data from multiple regions to obtain the general biological characteristics of the Chinese population. The formula for calculating the artificial lens power based on foreign populations is effectively modified based on the Chinese population.
This study aims to compare the time required for surgical planning using these two methods and to explore whether differences in surgical accuracy can be identified in a small study of 40 patients.
Effect of phacoemulsification on intraocular pressure has been studied with variable results.Furthermore, effect of phacoemulsification on ocular biometrics including anterior chamber depth and angle opening distance has also been studied. In our study we aim at establishing a quantitative relationship between preoperative ocular biometrics and postoperative intraocular pressure change and comparing this relationship in glaucomatous and non-glaucomatous eyes.
Aim of the study is to evaluate outcome of cataract surgery in different types of uveitis as regarding best corrected visual acuity (BCVA) and rate of post operative complications.