View clinical trials related to Cataract.
Filter by:The investigators will investigate whether video-assisted informed consent is superior to routine discussion for cataract patients about risks, benefits and alternatives to receiving phacoemulsification cataract extract and intraocular lens implantation, and will determine whether video-assisted informed consent can reduce the work load of physicians.
This study was set up to identify clinical outcomes including a refractive shift or change in IOL calculation accuracy and optical quality after Ophtec® capsular tension ring in the eyes without zonular instability.
The purpose of this study is to evaluate the visual outcome of the cataract surgery, including best uncorrected and corrected visual acuity, spherical equivalent, wavefront aberration and other measurements.
The purpose of this study is to characterize the safety and effectiveness of the ACRYSOF IQ ReSTOR +2.5 diopter (D) Multifocal Toric Intraocular Lens (IOL) in subjects at least 3 months and no more than 14 months after IOL implantation.
Different capsulorhexis size results in different capsular outcome when treating pediatric cataract, and there should be an appropriate capsulorhexis size for the best capsular outcome.
Abstract Purpose: To evaluate the visual performance and rotational stability of the Tecnis Toric one-piece IOL (AMO, USA) during the first 3 post-operative months Design: Prospective single center study Setting: VIROS - Vienna Institute for Research in Ocular Surgery, a Karl Landsteiner Institute, Hanusch Hospitel, Vienna, Austria Methods: In this prospective study patients with age-related cataract and corneal astigmatism of 1.0 to 3.0 D measured with the IOL-Master 500 (Carl Zeiss Meditec AG, Germany) were included. Pre-operatively, rotating Scheimpflug scans (Pentacam HR, Oculus, Germany) were performed and the cornea was marked in the sitting position at the slit lamp. Patients recieved a single-piece toric hydrophobic acrylic IOL (Tecnis Toric, AMO, USA). Immediately and 3 months after surgery retroillumination photographs were taken to assess the rotational stability of the IOL. Additionally, Autorefraction (Topcon, USA), subjective refraction, uncorrected and distance corrected visual acuity, keratometry, Scheimpflug and ocular wavefront (WASCA, Carl Zeiss Meditec AG, Germany) measurements were performed at the 3 months follow-up.
The pseudoexfoliation (PXF syndrome) is caused by production and deposition of extracellular material in the anterior chamber of the eye as well as in other tissues of the body. Approx. 70 million worldwide have a PXF syndrome. After cataract surgery a decentration and subluxation of the intraocular lens (IOL) happens more frequently than in the general population due to a higher incidence of zonular weakness and an increased capsular fibrotic reaction. Decentration, tilt and / or rotation of the lens can reduce the quality of vision. It is believed that the design of the implanted IOL, more precisely the front surface of the IOL has an influence on the extent of capsular fibrosis and contraction. Especially in presence of capsular instability, as it is in patients with Pseudoexfoliation syndrome the design of the IOL has an effect on the post-operative stability. In this study, two different IOL models are compared in terms of their stability. The "Tecnis 1-piece ZCB00" (AMO, USA), with a concave lowering comprising the lens edge and the "Acrysof SA60AT" (Alcon, USA), with a biconvex design are compared. Forty eyes of 20 patients are planned to be included in this study. One eye receives the "Tecnis ZCB00 1-piece "(AMO, USA), while the other eye receives the"Acrysof SA60AT "(Alcon, USA). In which eye which IOL is implanted, is assigned by randomization. To measure the decentration, tilt and rotation of the IOL an examination will be performed before the operation and there will be follow-ups one hour after the operation of the first eye, one hour after the operation of the second eye, three months and twelve months after the operation on the second eye. All measurements will be done without touching the eye.
More and more patients like to achieve complete spectacle independence after cataract surgery. Two possibilities that are particularly often used today are on the one hand multifocal lenses, and on the other hand the concept of monovision (in doing so one eye is adjusted for closeness and the other focuses for distance). The drawback with multifocal lenses is that some patients are bothered by glare phenomena, the disadvantage of monovision is that some patients lose a little of their stereo vision. The aim of this study is a direct comparison of these two methods. Therefore 70 patients are included in 2 groups. In one group, patients receive on both sides a multifocal IOL with a near addition of +1.5 D and the patients in the second group receive monovision. One hour, 1 week and 3 months after surgery, patients are invited and tests for visual accuity are performed for near vision (40cm), intermediate vision (80cm) and distant vision (400cm). Furthermore, contrast sensitivity and stereopsis of patients is assesed. Additional measurements for detecting the tilt of the lens will be performed.
We would like to evaluate the use of a 600μm pre-cut regarding wound architecture and surgically induced astigmatism as compared to a stab-incision (a corneal incision without a pre-cut). A dedicated wound architecture score will be used to evaluate wound configuration. Postoperatively, OCT scans will be obtained, corneal curvature will be measured and subjective and objective refraction will be performed in order to measure the surgically-induced astigmatism.
We investigated the hemostatic differences according to the main anesthetic agents by analyzing rotational thromboelastometry (ROTEM) under the hypothesis that propofol-based anesthesia would impair postoperative coagulability more than the sevoflurane-based anesthesia.