View clinical trials related to Glaucoma Eye.
Filter by: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.
Study aiming to compare between anterior segment Optical Coherence Tomography and Ultrasound BioMicroscopy In Glaucoma aSSESMENT
The aim of this study is to assess whether delaying early flow through the Ahmed tube shunt may improve the post-operative surgical outcomes and provide a more predictable outcome. To assess this the investigator will conduct a, randomized prospective, multi-centered study with collaborators at WashU in St. Louis, Duke University, Indiana University and the University of Pittsburgh. Participants will be randomized to have an AGV placement with tube ligation (no-early flow) and without ligation (allowing for early flow). IOP will be measured at day one, week one, and months, one, three six, and twelve. Additionally, clinical data regarding number of glaucoma medications, and complications post-operative complications will also be collected.
This Prospective Interventional Study will assess the efficacy of MPTLT in the UK.
An explorative study of the Mantis Photonics hyperspectral camera for retinal imaging and estimation of retinal oxygenation. Primary objective: To evaluate the performance of the hyperspectral camera for non-invasive retinal examination in order to improve the diagnosis of diseases affecting the retina or central nervous system. Secondary objective: To investigate the possibilities of the use of a hyperspectral camera for non-invasive retinal examination.
This clinical trial will assess the clinical safety and performance of the CorNeat EverPatch device used as a tissue substitute for concealment of artificial ocular implants.
The aim is to investigate repeatability and stability of the six OTH-related Bulbicam tests in patients suffering from Glaucoma (GLA), b) Cataract (CAT) and matched healthy controls (HC). The study population consists of the three subpopulations: 1) Patients suffering from GLA; 2) Patients suffering from CAT and 3) Gender- and age-matched HC without any eye diseases. Bulbicam will be used in the study including six tests and the standard method will be used initially for measurements of "Visual Field" and "Pupil" The study will be performed as a controlled, open, and non-randomized, stratified observational single center study. The stratification factors will be pathology and the degree of disease. Within each of the four strata, healthy matched controls related to gender and age (1:1) will be included. The main variables will be the variables recorded at the six Bulbicam and the supporting variables will be recorded by the Standard (ST) investigation. The central variables related to Glaucoma will be the GAT and iCare pressure, "Seen /unseen "," Time until the given point is recorded as seen", "the light in decibel when the point is seen", X- and Y-coordinates and "Pupil diameter in mm". The central variables related to cataract will be "Pupil diameter", "OCT RNFL ", "Seen /unseen "," Time until the given point is recorded as seen", "the light in decibel when the point is seen" and the X- and Y-coordinates. Participants, who fulfil the inclusion criteria; do not meet any of the exclusion criteria and willing to give informed consent to participate will receive an appointment for starting the study. The Bulbicam examination will be performed twice a day with a rest period of one hour between each registration. This procedure will be repeated the following two days. All demographic data, social factors and history of disease will be recorded at screening. Sixteen GLA-patients and 16 CAT-patients equally divided into two substrata will be recruited from the two participating hospitals. For each included patient, one gender- and age-matched HC will be recruited. In total 16 GLA-patients with 16 HC and 16 CAT-patients with 16 HC will be included in the study.
In adult patients, intraocular pression readings are often taken with an air puff tonometer or goldmann tonometer. The current gold standard for IOP measurement is the Goldmann Applanation Tonometry (GAT). In some patients, measurement of intraocular pressure taken by applanation or by air puff may prove to be impossible for various reasons (obesity, handicap, mental disorder, blindness for Air Puff Tonometry, Anxiety, etc). There are also many other devices that can be used to measure IOP, including those using rebound tonometry like the Icare 200. The rebound tonometer would systematize IOP screening because of its ease of use, provided its measurements are reliable. In this prospective study, investigators will be measuring participant's IOP with Goldmann Applanation Tonometry, Icare 200 Tonometer and Air Puff Tonometry to see if there is an agreement in IOP between the different devices. Investigators will also look if there is a concordance between central corneal thickness and IOP. Moreover, investigators will look if there is a IOP concordance between the 3 different devices for hight BMI people. Indeed, higher body mass index tend to have difficulties with proper positioning at the slit lamp that may lead to inaccurate GAT measurements. Additionally, stress level of the patients with different tonometry devices will be recorded using a visual analog scale.
The purpose of this study is to prospectively analyze changes in macular pigment optical density and dermal carotenoid levels as they relate to visual field function in patients prescribed a macular pigment-containing medical food (Lumega-Z), in combination with a topical carbonic anhydrase inhibitor.
The aim of the study is to identify clinical criteria, easily achievable with patient's follow-up tests, which can identify individuals at increased risk of being unfit to drive. Only they, then, will be directed to further investigations. These clinical standards should also be suitable for implementing or substituting the current law's criteria, after appropriate additional studies, so that the law can be based on the clinic.