Active clinical trials for "Cataract"

Purpose of this study is to find a correlation between agitation (stress) indicating parameters and the pain perception during second eye cataract surgery, compared to first eye cataract surgery.

Purpose: To examine the safety of omitting the routine postoperative eye clinic review following phacoemulsification cataract surgery. Background: Approximately 300000 cataract extractions are performed annually in the NHS in England, requiring a similar number of post-operative visits, the majority of which result in no change in management. A conservative estimate of 70% of visits being unnecessary suggests a potential saving to the NHS of approximately £10M annually. What's involved: The study involves some questionnaires during the duration of the study. These include questionnaires relating to the quality of life of the patient (conducted before the operation, and at the 3 month research clinic) and a patient satisfaction questionnaire. There is also a research clinic 3 months following the operation. What are the risks/benefits: There are no real personal benefits to patients on the trial. The trial aims to provide very important information regarding the safety of discharging patients immediately after surgery. However the trial could potentially save many thousands of unnecessary hospital visits each year.

The purpose of this study is to compare the use of an Anterior Chamber Maintainer (ACM) as the sole fluid source in phacoemulsification micro incision cataract surgery (using 1.1mm corneal incision) as opposed to conventional coaxial phacoemulsification (using 2.4mm corneal incision).

50 participants at Eye Hospital of Wenzhou Medical University during August, 2017 to July, 2020 will be enrolled in this study. To study the effect of cataract supermammary surgery on the morphology and function of meibomian glands

Evaluation of glistenings in intraocular lenses implanted in normal patients following routine cataract surgery. The lenses used will be Model X-60 made by the AVS company Vs AcrySof MA50BM made by the Alcon company.

This study will test a new method for preventing worsening of age-related macular degeneration (AMD) and for developing imaging methods to follow the very earliest microscopic changes in the disease. The macula is the part of the retina in the back of the eye that determines central vision. AMD can impair central vision, affecting a person's ability to read, drive, and carry out daily activities. Some studies suggest that cumulative exposure to sunlight increases the risk for progression of AMD to the late stage that is often characterized by poor central vision. This study will determine if wearing glasses with a yellow filter over one eye and a red-violet filter over the other eye when outdoors will decrease the rate of change of early-stage AMD in one or both eyes. Patients early-stage AMD who have had cataract surgery in both eyes with implanted lenses may be eligible for this study. Participants undergo the following procedures: Wear the filter glasses when outdoors between 10:00 a.m. and 4:00 p.m. Record the time of day and light environment when they use the glasses. Have an eye examination, pictures of the retina, and a medical history taken at the beginning of the study and at set intervals during the study. The study lasts at least 12 months and may be extended for a longer period of time....

Pilot study to evaluate usability of Mesotest II for assessment of night driving capacity of pseudo-phakic patients implanted with aspheric monofocal posterior chamber IOL *AT.Smart 46LC. Target Criterion: Measurement of contrast sensitivity and sensitivity to light under mesopic conditions (Mesotest II, Oculus).

The purpose of this study is to determine the accuracy of the Pentacam and IOL Master to calculate the effective corneal power (keratometry, corneal curvature) in patients who have undergone both corneal refractive surgery and lens extraction with intraocular lens implantation.

The purpose of the study is to confirm that Vigamox reaches similar aqueous concentration when administered as the commercially available eye drops or as a spray delivered from a proprietary device.

The aim of this study is to assess the association between vitreous hyper-reflective dots (VHD) and the macular thickness changes following uneventful phacoemulsification. In this prospective study the investigators performed optical coherence tomography (OCT) imaging in patients undergoing cataract surgery preoperatively and postoperatively after 1 week, 1 month and 3 months and analyzed the OCTs for VHDs. The investigators then measured the macular thickness in patients with VHDs and without VHDs and correlated the macular thickness with the number of VHDs.