View clinical trials related to Capsule Opacification.
Filter by:To study correlation between postoperative corneal edema and endothelial cell loss after cataract surgery by microcoaxial phacoemulsification.
This study aims to compare the retinal perfusion between diabetic and non-diabetic patients with Optical Coherence Tomography（OCT） Angiography after cataract surgery, to thoroughly evaluate the retinal state of diabetics after surgery, and to find out the relationship between postoperative complications occurred in retina and diabetes.
Investigate the proliferative capacity of individual lens epithelium capsule specimens in vitro and correlate it to the risk of developing PCO
Investigate the effect of polishing of the lens capsule during cataract surgery on the development of posterior capsule opacification
The most frequent long-term complication of cataract surgery remains to be posterior capsule opacification (PCO). During the past decades many new intraocular lenses (IOL) with optimized lens material and design were introduced. We propose a study comparing three acrylic single-piece IOLs with different design and hydrophobic material. All IOLs (Hoya NY-60, HOYA Surgical Optics GmbH; EyeCee One, Nidek Co., Aichi, Japan) are commercially available and are used for routine cataract surgery. In this study a comparison of PCO score of all two IOLs, a comparison of optic quality with wavefront analyses, visual acuity, contrast sensitivity, IOL decentration and tilt, slitlamp examination, fibrosis, glistening intensity (subjectively scored), YAG capsulotomy rate, and safety parameters (IOL related adverse reactions) of the investigated IOLs will be performed. Since PCO develops slowly within years, a long-term follow-up of three years will be necessary. As those IOLs are currently often implanted IOLs, their performance on PCO development and their optical quality is of high interest for the ophthalmologic community.
Multifocal lens allow most patients to be spectacle-free after cataract surgery. Most studies published up-to-date have focused on visual acuity, but not on patient-reported outcomes. Since some patients with very good postoperative visual acuity report being very uncomfortable after surgery, the aim of this study is to evaluate if patient satisfaction is correlated with other outcomes, such as low-contrast visual acuity, contrast sensitivity, photic phenomena and ability to tolerate defocus. Patients who have undergone surgery with bilateral multifocal intraocular lens implantation will be carefully evaluated 3 months after surgery to try to determine the factors that correlate with patient reported outcomes as evaluated with the Catquest SF-9 questionnaire.
This is a two-arm, parallel group, open-label, randomized controlled trial to compare the visual acuity, visual quality, operative complications and the satisfaction of patients between primary posterior capsulorhexis group and laser capsulotomy group of cataract patients combined with primary posterior capsular opacification (PPCO).
Today, cataract surgery has become one of the safest and most effective eye surgical procedures performed on many people through the development and development of surgical techniques and instruments. However, a significant number of patients who underwent cataract surgery still complain about postoperative symptoms, such as irritation, pain, dryness, burning sensation, and foreign body sensation. The reasons of dry eye (DE) development after cataract surgery include thermal and light toxicity from the microscope, corneal epithelial damage, and frequent irrigation of ocular surface during operation, sterilization of conjunctival sac and eyelid with chemicals, transection of the corneal nerves by corneal incision, use of topical anesthetics, and preservatives in topical eye drops. In this era of high expectation of patients and premium intraocular lenses, the postoperative discomforts cannot be accepted to many patients. Several studies have recently reported that the common cause of postoperative symptoms of the patients is DE. Furthermore, if the ocular surface is deformed due to DE syndrome after surgery, the optical quality is greatly affected which results in a decrease of the quality of vision. If the tear film becomes irregular, the higher-order aberration can change due to local irregular total radius of curvature of ocular surface and result in decreased visual acuity. There have been many attempts to treat DE syndrome after cataract surgery. Artificial tears are commonly used for the first line treatment of postoperative DE and several studies revealed its effectiveness on management of DE symptoms and signs. The postoperative use of cyclosporine 0.05 % topical eye drop improved DE symptoms and visual quality after cataract surgery. Recently, diquafosol sodium ophthalmic solution has been used for the management of DE after cataract. Diquafosol is a dinucleotide derivative and functions as agonist to the purinergic P2Y2 receptor. Diquafosol is known to stimulate not only the mucin secretion from the goblet cells but also water secretion from conjunctival epithelial cells and accessory lacrimal glands. According to previous studies, diquafosol has been found to be very effective in treating DE after cataract and to alleviate symptoms of DE syndrome. Furthermore, several studies have shown that topical diquafosol has a better efficacy in managing DE after cataract surgery than artificial tears. The preservative free diquafosol ophthalmic solution has been released recently. The use of eye drops without preservatives has also been shown to play an important role in the treatment of DE after cataract surgery. Until now, there is no study that evaluated the effect of preservative free diquafosol ophthalmic solution. Thus the investigators try to investigate the efficacy of preservative free diquafosol ophthalmic solution compared to preservative containing diquafosol ophthalmic solution and sodium hyaluronate ophthalmic solution, which are widely used in patients with DE after cataract surgery.
Residual lens fibers (RLFs) on the posterior lens capsule during cataract surgery can cause after cataract, affecting visual quality and increasing the medical cost for further laser posterior capsulotomy. However, conventional polish is inconvenient and time-consuming. We use an innovative fluid-jet method to remove RLFs, and compare the efficacy of fluid-jet and polish to prevent posterior capsular opacity after phacoemulsification.
There are indications in the literature that binocular vision disorders may occur after cataract and corneal refractive surgery. It is not clear whether these problems are new or represent decompensation of previously existing conditions. However, the following significant study limitations exist in the current literature: 1) lack of attention to non-strabismic binocular vision disorders, 2) incomplete binocular vision assessment, 3) a validated symptom survey was not used, 4) diplopia was typically the only symptom studied, 5) retrospective study design, and 6) in the few prospective studies the sample sizes were small. Given the limitations in the current literature there is a need for further study of the prevalence and significance of binocular vision problems after cataract surgery and binocular vision and accommodative problems after corneal refractive surgery. This study aims to determine whether there is an increase in the prevalence of binocular vision problems after cataract surgery and accommodative and binocular vision disorders after refractive surgery.