Active clinical trials for "Glaucoma, Angle-Closure"

Assessing the safety and efficacy of a micro-bypass stent in combination with cataract surgery in subjects with primary angle closure. Subjects are randomized into two arms: phacoemulsification cataract surgery alone versus phacoemulsification cataract surgery combined with the micro-bypass stent implantation. Post surgery intraocular eye pressure will be recorded to assess the efficacy of both arms.

Increases in the aging population has resulted in increased demand for glaucoma services. Glaucoma is a disease that if untreated, can lead to blindness. This increase and need for long term treatment with monitoring have resulted in a significant demand in the hospital eye service (HES). Many departments are now facing a considerable backlog of outpatient appointments and it's essential that these appointments are reserved for patients who are at risk of glaucoma blindness. Primary angle closure (PAC) glaucoma is a type of glaucoma, where the drainage route for the fluid inside the eye (known as the angle) is narrowed or blocked. It has been recently identified that approximately half of patients referred into the HES for a suspect narrow angle for further investigation are healthy and are immediately discharged. The exact reasons for these findings are unknown. This project will investigate clinical decisions by community optometrists who account for the majority of PAC referrals into the HES, as well as assessing their ability to evaluate those at risk of PAC. This project will also examine whether clinical agreement could be improved by providing an educational package. A clinical image database of angles will be acquired from glaucoma patients attending Moorfields Eye Hospital. A learning package discussing angle closure referral will also be developed. Community optometrists will be invited to complete a questionnaire on their clinical decision making. This will be followed by the vignette assessment, learning package and re-assessment. If this educational package and/or any other identifiers are found to improve agreement levels, this could reduce the number of referrals and enable community monitoring of those at low risk of developing PAC glaucoma in their lifetime.

This Prospective Interventional Study will assess the efficacy of MPTLT in the UK.

No single type of laser or set of laser parameters is appropriate for all type of irides. Pure Nd:YAG laser iridotomy is very effective in the light color irides. It was considered as the gold standard for iridotomy. It, however, is less effective and causes some complication such as iris hemorrhage especially in patients with dark iris.

The goal of this study is to evaluate the efficacy and safety of the novel form of trans-scleral cyclophotocoagulation using micropulse diode laser and trans-pars plana treatment (Micropulse TSCPC, mTSCPC MP3, IRIDEX CYCLO G6™ Glaucoma Laser System, CA, USA) in adults for the treatment of uncontrolled glaucoma.

A prospective, randomized comparative study on adult patients with synechial angle closure glaucoma.

Primary angle closure glaucoma (PACG) is caused by contact between the iris and trabecular meshwork, which in turn obstructs outflow of the aqueous humor from the eye. This contact between iris and trabecular meshwork (TM) may gradually damage the function of the meshwork until it fails to keep pace with aqueous production, and the pressure rises, and at last the optic nerve is damaged, the vision may be lost in some severe cases. Therefore, ocular pressure reduction is the key to treat the disease and prevent blindness. Trabeculectomy is the most common conventional surgery performed for glaucoma. This allows fluid to flow out of the eye through this opening, resulting in lowered intraocular pressure(IOP) and the formation of a bleb or fluid bubble on the surface of the eye. Cataract surgery is common in the elderly. Cataract surgery is the removal of the natural lens of the eye (also called "crystalline lens") that has developed an opacification, which is referred to as a cataract. Cataract extraction includes intracapsular cataract extraction, extra capsular cataract extraction & phacoemulsification, and phacoemulsification is the preferred method. It has been reported that IOP reduction could occur in cataract patients with PACG after the cataract surgery. For some cases with PACG, such IOP reduction may be insufficient for neuronal protection, and many patients still require glaucoma medication and incisional surgery such as trabeculectomy to control IOP. In such cases, a combined cataract-glaucoma procedure (phacotrabeculectomy) is a reasonable option. In keeping with this concept, previous studies have shown that phacotrabeculectomy could effectively and simultaneously reduce IOP and improve vision in patients with a coexistence of PACG and vision-threatening cataract. However, phacotrabeculectomy may heighten inflammatory response, result in a higher frequency of postoperative complications such as hyphema and fibrin in the anterior chamber, endophthalmitis, and increased scarring of the filtering bleb. Thus, it is unclear whether phacotrabeculectomy is as effective and safe as trabeculectomy in lowering IOP for PACG patients. In the present study, the investigators compared the efficacy and safety of phacotrabeculectomy and trabeculectomy in patients with coexisting PACG and cataract.

This study was to evaluate the efficacy and safety of immediate anterior chamber paracentesis (ACP) with a 30-gauge needle as an initial treatment for acute primary angle closure (APAC).

The purpose of this study is to determine if phacoemulsification with intraocular lens implant (phaco/IOL) alone or combined with goniosynechialysis is better at controlling intraocular pressure in subjects with primary angle closure.

This is a randomised controlled clinical trial to compare laser peripheral iridotomy (LPI) and primary phacoemulsification with intra-ocular lens implantation (phaco/IOL) in the treatment of acute primary angle-closure glaucoma (APACG). Following successful medical lowering of raised intra-ocular pressure (IOP) and control of intraocular inflammation, patients presenting to Singapore National Eye Centre and Singapore General Hospital with acute primary angle-closure glaucoma who meet the eligibility are randomised to one of the two treatment arms: laser peripheral iridotomy and primary phacoemulsification with intra-ocular lens implantation. These patients will be monitored closely for 2 years post-operatively.