View clinical trials related to Glaucoma.
Filter by:The investigators will include different subgroups of open-angle glaucoma and healthy controls. The participants will attend two visits with two weeks apart. At each visit the participants will have blood drawn and will undergo OCT examination. In between the two visits, participants will receive a treatment of Nicotinamide 1,5g/day for one week and 3.0g/day for the second week.
Glaucoma is a blinding optic neuropathy affecting 80 million people worldwide, with primary open-angle glaucoma being the most common etiology. Today, the therapeutic arsenal includes drug-based hypotonizing treatments, lasers and surgery. In France, the most common surgical techniques are trabeculectomy and deep non-perforating sclerectomy (SPNP). The principle behind these filtering techniques is to lower intraocular pressure (IOP) by creating an escape route for aqueous humor from the anterior chamber (AC) of the eye into the subconjunctival space, creating a filtration bubble (FB). A new minimally invasive treatment option has been developed to limit intra- and post-operative complications. This new technique is based on an ab interno approach, with implantation through the anterior chamber of a 6mm-long, 45µm-lumen collagen tube called XEN®. As a result, there is no dissection of the conjunctivotenone planes, as is the case in traditional surgery. Since June 2017, surgeons have been able to use the XEN® technique in the ophthalmology department at GHPSJ. Today, no study has yet assessed endothelial cell loss more than 2 years after this surgery. Indeed, the presence of an anterior chamber device of any type can be associated with endothelial cell loss, which increases over time well after the surgical procedure, and may require removal of the device several years after surgery. Recent studies have investigated peripheral endothelial cell loss with other drainage systems. They show a significant decrease in peripheral endothelial cell density in relation to the implant placed in the anterior chamber. The aim of this study is to evaluate central and peripheral endothelial cell density in the long term after XEN® placement. At the visit more than 3 years after XEN® implant placement, IOP and pachymetry measurements were taken, along with a measurement of peripheral and central endothelial cell density. Corneal peripheral endothelial cell density is measured on the different quadrants of the treated eye, as well as on the controlateral eye. Measurements will be made for each eye for patients undergoing surgery on both eyes.
Glaucoma is a common, potentially blinding pathology, threatening patients' autonomy and quality of life. The main aim of treatment is to lower intraocular pressure (IOP) in order to slow nerve fiber loss as much as possible, leading to alterations in the visual field and even reduced visual acuity. To achieve this drop in pressure, there are, of course, hypotonizing eye drops, trabeculoplasty with Laser Selecta (SLT) or filtering surgery (trabeculectomy, deep non-perforating sclerectomy, insertion of drainage devices). Laser Selecta specifically targets pigmented trabecular meshwork cells without damaging adjacent structures, and is thought to act via three mechanisms: distension of Schlemm's canal, reorganization of trabecular meshwork cells and stimulation of extracellular matrix production. Its efficacy has been demonstrated in several studies, with a 20-30% reduction in intraocular pressure in patients who have never undergone surgery. Few studies have investigated the efficacy of SLT in patients who have already undergone filtering surgery. The aim of this study is therefore to determine the efficacy of SLT in previously operated patients whose intraocular pressure remains insufficiently controlled.
To determine whether the Occuity PM1 device is non-inferior in measuring central corneal thickness when compared to ultrasound pachymetry, the Lenstar and the Pentacam. The Investigation aims to assess long-term safety of the Occuity PM1 device when used under the conditions and for the purposes intended, to ensure it will not compromise the clinical condition or the safety of patients, or the safety and health of users or, where applicable, other persons. The central corneal thickness measurements taken by the three devices: Occuity PM1, the ultrasound pachymeter and Lenstar. Demonstrating that the Occuity PM1 Pachymeter is not inferior to the LenStar in terms of equivalency to a 95% confidence level using the Bland Altmen equation/approach based on +/-20micron equivalency. The investigators would like to measure the thickness of the cornea, which is the clear window at the front of the eye. A corneal thickness measurement is important for several reasons. The measurement can tell an eye care professional if the cornea is swollen, which may mean the particiapnt have an increase in fluid within the cornea. Also, assessing corneal thickness can help in the diagnosis of glaucoma and the measurement is important if the participant is going to have eye surgery. The instruments that are currently in use are usually very large and quite expensive and therefore not ideal for use as part of routine eye care. Some instruments require contact with the surface of the eye, which may be uncomfortable. Occuity Ltd. is a medical device company based in Reading, which has been investigating this. They have developed a new instrument (called the 'PM1 Pachymeter') for measuring the thickness of the cornea. The instrument shines a harmless low power beam into the eye and then measures the light reflected back from the eye in order to check the thickness of the cornea. The low power beam is not a visible light and so the participant will not be able to see it. s study will assess how closely the eye measurements taken from the new PM1 Pachymeter matches eye measurements taken from two other devices that are currently on the market. The goal is to provide a non-contact, hand-held meter that is fast and easy to use without the need to contact the eye.
To screen for the presence of glaucoma in a Belgian population over 40 years old using an AI algorithm developed for the detection of glaucoma based on fundus pictures.
In this study, participants will be imaged using two Optical Coherence Tomography (OCT) devices: device N, a standard conventional OCT device with an invention (comfortable chin and forehead rest that can be adjusted to fit each individual's size) attached to the device; and device C, the standard conventional OCT device with no invention attached. The investigators will assess whether the chin and forehead rest attachment (invention) provides a more comfortable experience for patients.
The goal of this clinical trial is to compare a new device for testing peripheral vision (the SmartSystem virtual reality headset) to the currently most commonly used standard testing device (the Humphrey HFA-III). The main questions this clinical trials aims to answer are: 1. How comparable in performance, accuracy, and patient comfort the SmartSystem VR headset is to the Humphrey HFA-III, and 2. Surveying patients about the perceived ease of use and patient experience with the SmartSystem VR headset, compared to the Humphrey HFA-III. Participants will be asked to use the SmartSystem VR headset to take an additional visual field test (which takes between 10 to 15 minutes to do) and to take a brief survey about their experience. This will occur on regularly scheduled clinic visits and done in addition to the standard tests and examinations scheduled for that day. Researchers will compare the patients' test results and survey responses for both the SmartSystem VR headset and the Humphrey HFA-III to see which has more favorable performance, reliability, duration of testing and user experience.
The purpose of this study was to asses differences in nycthemeral (24-h) intraocular pressure (IOP) profiles and outflow facilities between patients who have undergone epibulbar microshunt implantation and ab interno trabeculectomy, respectively.
The objective of this study is to collect stereo-optic disc photographs for potential future analysis.
To compare the potential efficiency and educational value of using NGENUITY (3D camera system, FDA approved for this indication) vs the conventional microscope for Hydrus microstent placement by new users.