Active clinical trials for "Cataract"

Phacoemulsification with implantation of posterior chamber lenses represents the gold standard of care for patients needing lens surgery, but there is an increased risk of developing pseudophakic retinal detachment after surgery. Especially myopic patients have an even higher risk of pseudophakic retinal detachment compared to the general population. The aim of this multicenter study is to document the presence and/or post-operative development of posterior vitreous detachment (PVD) and to assess its influence on the incidence of retinal detachment (RD) in myopes in a time period of three and five years after lens surgery. 618 eyes of patients scheduled for regular lens surgery will be included, defined by an axial length of 25.0 mm or more. To examine the vitreous status, all patients will receive a comprehensive eye examination pre-operatively, including funduscopy with assessment of a Weiss ring and optical coherence tomography (OCT). Patients will be divided into two groups, group A with pre-operative complete PVD and group B with no/partial PVD. Group A will be invited for one follow-up visit (two months post-operatively) followed up by telephone interviews at one, two, three and five years after surgery to determine occurrence of pseudophakic retinal detachment. Group B will be invited for follow -up examinations at two months, six months and one year after surgery to document occurrence of PVD (if a PVD is present at one of the follow-ups, no more visits are necessary). Two, three and five years after surgery, all patients from group B will be interviewed by telephone, as in group A, to document the occurrence of pseudophakic retinal detachment. In the recent literature the association between the occurrence of PVD pre-/post-operative and RD after lens surgery is well documented but not described for myopic patients. The results of this multicenter study should help to tackle the problem of RD prediction in myopic patients depending on their pre-operative vitreous status, especially in the setting of refractive lens exchange.

This study evaluates the various ocular parameters which are necessary for ocular biometry and the calculated IOL powers using both dual Schiempflug analyzer and optical low-coherence refelctometry.

To investigate changes in anterior chamber angle configuration after phacoemulsification and intraocular lens (IOL) implantation with Swept-Source Optical Coherence Tomography (SS-OCT).

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.

Comparison of the visual quality of traditional ultrasound biometrics and lenstar on the cataract patients with diabetic retinopathy after vitrectomy in the 3 months later.To evaluate the clinical value of lenstar in post-vitrectomy patients.

The aim of this questionnaire survey is to evaluate the improvement in vision-related quality of life before and after cataract surgery using the National Eye Institute Visual Function Questionnaire 25 and the delay of improvement in the COVID-19 pandemic.

The goal of the study is to determine the visual outcomes in patients with mild, pre-perimetric glaucoma who undergo cataract surgery with implantation of the Alcon Vivity Extended Range Intraocular Lens (IOL).

To evaluate the influence of the visual acuity after congenital surgery on the retinal and visual cortex structure.

A retrospective chart review of 264 eyes from 177 patients was performed who underwent congenital cataract surgery before the age of 14 years. All patients' surgery was performed by the same experienced surgeon at the Eye Hospital of Wenzhou Medical University from May 2011 to March 2019. We recorded patient demographics and incidence and risk factors for glaucoma-related adverse event. This study to identify the incidence of and risk factors associated with postoperative glaucoma at various durations after congenital cataract surgery.

MAIN OBJECTIVE: To assess the influence of residual astigmatism on visual acuity in the different lens foci in patients operated on for cataracts with a trifocal intraocular lens implant. SECONDARY OBJECTIVE: To study the influence of residual astigmatism on the visual quality of the patient in the far focus and to determine if there are differences of affectation in the two study groups.