View clinical trials related to Macular Edema, Cystoid.
Filter by:Aim of the study is to assess the rate of postoperative intraretinal cystoid changes after pars plana vitrectomy with membrane peeling and peribulbar application of triamcinolone acetonide and to examine possible risk factors for postoperative intraretinal cystoid changes.
Purpose: To evaluate retinal functional improvement by means of visual acuity and retinal sensibility examination after intravitreal dexamethasone implant in patients affected by cystoid macular edema secondary to retinal vein occlusion.
This study is undertaken to determine the effect of intravitreal long acting dexamethasone implant,(Ozurdex®)in patients with diabetic macular edema.Diabetic macular edema is important cause of visual impairment in patients with diabetes mellitus. Focal/ grid laser photocoagulation is the standard of care in its management. Several adjuncts including intravitreal corticosteroids, Pegabtanib Sodium ,Ranibizumab, Bevacizumab, non-steroidal anti-inflammatory agents, corticosteroids, laser photocoagulation have been tried. Intravitreal Triamcinolone Acetonide (TA), a water insoluble steroid, has been shown to reduce the retinal thickness and improve the visual acuity. However, recurrence of macular edema in patients who receive intravitreal TA is a major concern as the patients need multiple repeat injections because of its short half life. A more potent steroid, dexamethasone has also been tried as an alternative to TA for macular edema; however, its short half life of only 3 hours prevents its clinical application. In search for the ideal corticosteroid preparation, a Dexamethasone Posterior Segment Drug Delivery System (Dexamethasone DDS - Ozurdex®, Allergan Inc, Irvine, California) was recently developed. Promising results have been shown in certain patients with retinal vein occlusions, uveitis receiving this intravitreal drug delivery system with improvement in visual acuity. The present study introduces a novel concept of using Ozurdex ® implant in patients with diabetic macular edema.
This study is undertaken to determine the effect of intravitreal long acting dexamethasone implant, (Ozurdex®) in improving outcome of cataract surgery in patients with diabetic macular edema. Diabetic Macular Edema and cataract constitute important causes of visual impairment in patients with diabetes. Cataract surgery in patients with diabetic retinopathy is associated with progression of retinopathy. Several modalities such as non-steroidal anti-inflammatory agents, carbonic anhydrase inhibitors, corticosteroids, hyperbaric oxygen, laser photocoagulation and vitrectomy with internal limiting membrane peeling have been tried for managing inflammatory cystoid macular edema. Intravitreal Triamcinolone Acetonide (TA), a water insoluble steroid, has been shown to reduce the retinal thickness and improve the visual acuity. However, recurrence of macular edema in patients who receive intravitreal TA is a major concern as the patients need multiple repeat injections. In search for the ideal corticosteroid preparation, a Dexamethasone Posterior Segment Drug Delivery System (Dexamethasone DDS - Ozurdex®, Allergan Inc, Irvine, California) was recently developed. Promising results have been shown in certain patients with persistent diabetic macular edema receiving this intravitreal drug delivery system with improvement in visual acuity The present study introduces a novel concept of using intraoperative Ozurdex ® implant in patients with diabetes mellitus while undergoing cataract surgery to minimize the worsening of diabetic maculopathy.
The study will evaluate the efficacy of prophylactic administration of the topical nonsteroidal anti-inflammatory drug (NSAID) ketorolac tromethamine 0.5% (Acular®) on cystoid macular edema (CME) in patients having undergone cataract surgery. CME is the most frequent cause of decreased vision after uncomplicated cataract surgery and can result in irreversible sight reduction. The investigation will involve a comparison arm and a treatment arm with both sets of patient populations being evaluated for CME with ophthalmologic examinations and optical coherence tomography (OCT) measurements. The objective is to elucidate the role of NSAID drops in preventing CME after cataract surgery.
This study will compare the safety and effectiveness of two treatments-injections of triamcinolone acetonide into the eye vs. standard laser therapy-for macular edema (swelling in the center of the retina) that is caused by blockage in a retinal blood vessel. Edema caused by blockage in a large vessel is called central retinal vein occlusion (CRVO). Edema caused by blockage in a smaller vein is called branch retinal vein occlusion (BRVO). Triamcinolone acetonide is a steroid drug that reduces swelling; the Food and Drug Administration has approved it for injection into joints and muscles to treat inflammatory conditions. Patients 18 years of age and older with macular edema due to CRVO or BRVO of between 3 and 18 months' duration may be eligible for this study. Candidates are screened with a medical history, blood pressure measurement, and urine pregnancy test for women who can become pregnant. Screening also includes the following procedures: - Eye examination to assess visual acuity and eye pressure, and to examine the cornea, lens, and retina. The pupils are dilated with drops for this examination. - Fluorescein angiography to evaluate the eye's blood vessels. A yellow dye is injected into an arm vein and travels to the blood vessels in the eyes. Pictures of the retina are taken using a camera that flashes a blue light into the eye. The pictures show if any dye has leaked from the vessels into the retina, indicating possible blood vessel abnormality. - Optical coherence tomography to measure retinal thickness. The eye is examined with a machine that produces cross-sectional pictures of the retina. The patient is seated in front of a machine and looks at a pattern of flashing and rotating red and green lights, first with one eye and then with the other. - Fundus photography to help evaluate the status of the retina and changes that may occur in the future. Photographs of the retina are taken using a camera that flashes a bright light into the eye. Participants are randomly assigned to receive triamcinolone injections or standard treatment. Triamcinolone is given in either a 1-mg or 4-mg dose. Standard treatment for CRVO and for BRVO with excessive blood in the retina is observation. Standard treatment for BRVO without excessive blood is laser therapy. Patients with BRVO who do not qualify for laser therapy when they enter the study may have it later if blood clears enough to permit treatment. The procedures for triamcinolone injections and laser therapy are as follows: - Triamcinolone acetonide: The eye is numbed with anesthetic drops and the study drug is injected into the vitreous, the jelly-like substance located between the back of the lens and the retina. Patients apply antibiotic drops at home for 3 days following the procedure. - Laser treatment: The eye is numbed with anesthetic drops and a special contact lens is placed on the eye during the laser beam application. All patients are followed every 4 months for 3 years. Additional visits may be scheduled if needed. Patients who receive triamcinolone injections are also examined within 1 week of each injection and 1 month after each injection. At the 4-month visits patients undergo repeat eye examination and fundus photography. Optical coherence tomography is done at some visits, and fluorescein angiography is repeated at months 4, 12 and 24. Blood pressure is measured at months 12, 24 and 36. Patients may be retreated with triamcinolone injections or laser therapy as often as every 4 months, depending on their response to treatment.
The SCORE Study will compare the effectiveness and safety of standard care to intravitreal injection(s) of triamcinolone for treating macular edema (swelling of the central part of the retina) associated with central retinal vein occlusion (CRVO) and branch retinal vein occlusion (BRVO).
This study will look for the presence in blood of a substance called vascular endothelial growth factor (VEGF) in patients with uveitis (eye inflammation). It will also look for this substance in eye fluid samples taken from patients with uveitis who are undergoing eye surgery. Some patients with uveitis experience some vision loss during an inflammatory attack because of swelling (edema) in a particular area of the retina called the macula, which is involved in visual acuity. It may be that VEGF is involved in the development of macular edema. Patients with uveitis who participate in this study will have about 10 cc (2 teaspoons) of blood drawn to be examined for VEGF. They will also undergo a procedure called fluorescein angiography to look at the blood vessels of the eye. A dye called sodium fluorescein is injected into the blood stream through a vein. After the dye reaches the blood vessels of the eye, photographs are taken of the retina. In addition, patients with uveitis who are undergoing eye surgery will have a tissue specimen (either aqueous fluid or vitreous gel) collected for examination for the presence of VEGF.
To test the efficacy of acetazolamide for the treatment of uveitis-associated cystoid macular edema.