View clinical trials related to Cataract.
Filter by:The Artisan lens (Artisan Aphakic, Ophtec BV) is an iris- claw lens designed for implantation in children with insufficient capsular support. In spite of less surgical manipulations and a relatively shorter operation time, the procedure carries the risk of corneal endothelial cell loss or dis-enclavation, particularly in children. However, most of the studies that studied iris-claw lenses in aphakic children were retrospective evaluated only a single technique; either anterior or retropupillary fixation, or comparable to other techniques of fixation. Thus the aim of this work is to prospectively compare the 2 techniques of iris-claw lens implantation and their effects on central endothelial cell density, the anatomical and visual outcome, as well as the complications' rate.
This prospective randomized controlled trial will be conducted to investigate Clareon intraocular lens (IOL) stability in vitrectomy patients. The investigator plans to target the patients undergoing cataract surgery. A randomized study will be conducted with 2 arms, one with Clareon IOL versus a second arm using the Tecnis 1 In this non-inferiority study, the investigator will compare Clareon IOL from Alcon with the existing Tecnis 1 IOL from Precision Lens which is the commonly used intraocular lens in combined vitrectomy cases in Hong Kong.
The study objectives were: - To evaluate the efficacy of EDTA 1.3% and 2.6% ophthalmic solution (C-KAD) in improving visual function as assessed by contrast sensitivity; - To evaluate the safety and tolerability of two doses of EDTA ophthalmic solution (C-KAD); and - To determine the optimal clinical dose of EDTA ophthalmic solution (C-KAD) which to proceed into pivotal study(s).
This study investigates whether television viewing or music listening can reduce pre-operative anxiety and improve surgical outcomes for patients undergoing cataract surgery. It aims to determine the effectiveness of these interventions compared to a control group and assess their impact on physiological markers of anxiety as well as the incidence of intra-operative hypertensive events. The key questions that are to be answered are: 1. Does watching television before cataract surgery decrease intraoperative hypertensive events and/or pre-operative anxiety in patients? 2. Does listening to music before cataract surgery decrease intraoperative hypertensive events and/or pre-operative anxiety in patients?
During cataract surgery an artificial intraocular lens (IOL) is implanted in the eye to replace the lens and to correct the refraction for distance vision. Misalignment of IOLs can cause severe loss of visual quality. Different types of misalignment are known. Tilt, one type of IOL misalignment is thought to play a negative role for the optical performance in eyes with IOL designs, especially, if they have aspheric, toric, or multifocal optics. Various methods to measure IOL misalignments have been described. Studies assessing the IOL position have used subjective grading methods at the slit lamp examination or a Scheimpflug camera to assess IOL decentration and tilt. The subjective grading at the slitlamp may display considerable variability between examiners. This method is more qualitative than quantitative and does not allow fine resolution when reporting IOL tilt. The fact that the patient has no standardized target to focus on makes the method even less reliable. Scanning methods such as Scheimpflug photos require a very well dilated pupil exceeding 6mm to assess the IOL position. Additionally, it can be difficult to identify the anatomical structures of the eye that need to be used as points of reference. Scheimpflug camera images have been used for assessing IOL tilt previously, but erroneous results, often due to corneal magnification, have diminished their widespread use. Another possibility to assess tilt is the use of Purkinje reflexes. The light reflections of Purkinje images at ocular surfaces to evaluate ocular alignment have recently been utilized. Since light is reflected at all interfaces of media with a difference in refractive index, these reflections, called Purkinje images, can be used to assess tilt and decentration of IOLs. Two different clinically applicable Purkinjemeter system provide the measurement of IOL decentration and tilt. The main problem with Purkinje meters is accessibility, as there are only a few prototypes available worldwide. The most recently developed method for tilt quantification is the use of optical coherence tomography. This method has several advantages compared to the previous methods: OCT based devices are available in most clinics, the resolution of modern OCT devices is high, and the measurements are reproducible. Aim of this study is to measure tilt with two modern OCT based devices and one Scheimpflug camera and to predict the post-operative tilt using partial least squares regression. This method was developed by Wold and introduced to ophthalmology previously.
The purpose of the present study is to compare the outcome of multifocal toric intraocular lens with standard multifocal lens plus incisional surgery in patients undergoing bilateral cataract surgery.
Intraoperative Floppy Iris Syndrome (IFIS) is a potentially serious cataract surgery complication. IFIS is most commonly associated with the chronic use of tamsulosin and other alpha1-adrenergic receptor antagonists prescribed in low urinary tract symptoms. There are a number of guidelines for operative technique modifications with the aim to prevent the development of IFIS. The study focuses on two options for prophylactic strategies: the application of atropine drops and the instillation of intracameral epinephrine.
The goal of this observational study is to learn about the verification of the effectiveness and visual acuity of LUMINA in patients after lens replacement due to cataracts. The main questions it aims to answer are: - Evaluation of the effectiveness of the LUMINA lens in patients after lens replacement due to cataracts - Evaluation of the accommodative power of the LUMINA lens. Participants will have cataract surgery and the IOL LUMINA will be implanted in the sulcus.
To compare the effects of hydroxypropyl guar (HPG)/hyaluronic acid (HA)- and carboxymethylcellulose (CMC)/HA-based lubricant eye drops on subjective and objective outcomes in dry eye disease (DED) patients after cataract surgery.
Hanita Lenses new Intensity IOL and Intensity Toric were been designed to have very high efficiency of light leading to a high MTF, wide focal ranges of far, intermediate and near vision and minimal loss of light energy. The main purpose of this study is to collect existing post-operative data based on standard of care follow up visits at the clinic.