Active clinical trials for "Macular Degeneration"

The purpose of this study is: To evaluate the safety and tolerability of RPE cellular therapy in patients with SMD Group When-MA09-hRPE cell transplantation to evaluate the safety of surgical procedures. In future studies intended to assess the number of transplanted hRPE cells. In the past, MA09-hRPE cell therapy used in the study was to evaluate the validity of the potential. Homologous retinal pigment epithelial cells derived from embryonic stem cells, future studies of drugs that are used in representing the potential validity to evaluate the optimal dose.

The purpose of this study is to utilize flavoprotein fluorescence and fundus autofluorescence to detect progression of Stargardt macular dystrophy in a pediatric population over the course of a year with the hope of aiding future therapeutic risk-benefit decisions and assessment of outcomes. Stargardt macular dystrophy is the most common of the juvenile-onset macular dystrophies. Despite determination of ABCA4 as the causative gene, clinicians have been challenged by variability in clinical phenotypes. Given the recent initiation of clinical trials to assess novel treatments (e.g. gene therapy), there is a need to identify patients with the worst prognosis. The investigators have observed that pediatric patients lose central visual function faster than their adult counterparts. Thus, they present an ideal cohort with which to determine the utility of novel modalities to detect early change. These include flavoprotein fluorescence, a new imaging technique for detecting mitochondrial dysfunction developed at the University of Michigan. Fundus autofluorescence (FAF) is another commonly utilized technique of evaluating hereditary eye diseases. The investigators have developed a novel means of quantifying FAF signatures that will allow documentation of severity as well as detection of progression.

Choroidal neovascularization is a leading cause of visual loss in people older than 60 years and for its treatment there had been performed multicentric studies with Lucentis (Ranibizumab) with a significant improval of visual acuity. In our institution we evaluated efficacy of bevacizumab in several pathologies but we dont know what would be the results if we use the same dose several times. Our purpose was to determine the efficacy of bevacizumab for improve or stabilize visual acuity with two or more intravitreal inyections of bevacizumab.

In this prospective clinical study SRT is performed with various pulse durations at 1.7µs and additionally 200ns to evaluate the different clinical effects of both laser regimens. The macular diseases to be treated are drusen maculopathy and geographic atrophy due to age-related macular degeneration as well as diabetic macular edema and central serous chorioretinopathy. The beneficial effect in laser treatment is thought to be associated with the restoration of a new barrier of retinal pigment epithelium cells. If this theory is true, the destruction of the photoreceptors causing visual field defects would be only an unwanted and unnecessary side effect. Thus, SRT is able to avoid these unintentional side effects and to achieve the benefit by just treating the RPE. In this study the clinical effect of SRT for these diseases is evaluated on a long-term basis.

Injections of medicine into the middle of the eye (intravitreal injections) are commonly used in a multitude of retinal diseases. We are looking for new treatments that may be beneficial in treating retinal disease and improving patients' vision. Infliximab (Remicade) is a genetically engineered antibody against a molecule in the body called TNF-α. It neutralizes the effects of TNF-α by binding to it. Intravenous Infliximab has been used for inflammatory arthritic conditions and Crohn's disease since 1998. We do not know if infliximab injections into the eye are safe. We are performing this pilot study to determine if they can be safe.

This study is designed to identify the effect of current vitreous surgery for symptomatic macular tractional maculopathy. Characteristics of this study is as below Multicenter, prospective clinical trial. (early surgical intervention vs.surgical intervention when full-thickness macular hole formation or deterioration of visual acuity occurs) Non-randomized study (decision was made by patients after full explanation) After 1 year follow up, functional change(visual acuity)and anatomical change would be evaluated

The purpose of the study is to compare photodynamic therapy to transpupillary thermotherapy as a treatment method for choroidal neovascularization in age-related macular degeneration ( AMD). AMD is a disease affecting the macula, the central area of the retina.There are two main types of AMD. Geographic atrophy ( dry) AMD and neovascular ( wet) AMD. In neovascular AMD, sub-retinal neovascular membranes ( new blood vessels) develop beneath the retina. The new vessels can leak causing haemorrhage that leads to significant visual loss. Photodynamic therapy ( PDT) is a method for treating neovascular membranes without affecting the retina. Photoactive chemicals are injected into the patient and irradiated with light as the pass through the neovascular membranes. This light is strong enough to activate the chemicals, that destroy the blood vessels, but not strong enough to cause damage to the overlying retina. The duration of the treatment is 83s. PDT treatment is effective in predominantly classic subfoveal choroidal neovascularization ( CNV), but was observed to yield no visual benefit in minimally classic CNV during a 2-year follow-up and as to occult CNV the effect was scarce. PDT does have its drawbacks, one of which is the cost. Another is that the patient become highly sensitive to strong light. Transpupillary thermotherapy ( TTT) is a thermic treatment of choroidal neovascularization in AMD. Using a thermal diode laser ( emission 810 nm), transpupillary irradiation of the fundus through a conventinal contact lens is performed. The temperature is elevated < 10 degrees C during a 60s exposure to continuous radiation. The laser power is adjusted to the diameter of the laser beam. In a pilot study, Reichel et al. ( 1999) demonstrated that subfoveal occult CNV could be occluded and visual acuity stabilized in a majority of patients treated with TTT. These results has been confirmed in small series of cases with occult CNV and with minimally ( <50%) classic CNV. This prospective, randomized controlled study aim to compare TTT and PDT as a treatment for occult and minimally classic CNV. A total of 140 patients will be included in the study. Follow up is 2 years. The patients included will be followed as to visual acutiy ( ETDRS), new vessel growth ( fluorescien angiography and ICG), OCT and with a quality of life questionnarie.

Subretinal hemorrhage in the macula causes a significant loss of vision. This hemorrhage can be displaced by the use of a small volume of pure perfluorocarbon gas injected into the vitreous, which expands to a 40% gas bubble in the eye. When the patient gazes 40 to 60 degree below the horizontal, the gas bubble covers the hemorrhage and gravity displaces it rapidly. This position of gaze is easier for the patient than the face down position traditionally recommended.A vector of gravity force tangential to the sclera brings about this displacement. The procedure can improve vision quickly, reduce unwanted degenerative changes in the macula because of the persistent macular hemorrhage and improves the chances of treating of the underlying cause for the subretinal hemorrhage by laser or other means.

The purpose of this project is to diagnose and evaluate ocular and related tissues with various diseases such as conjunctival, corneal, uveal, vitreoretinal and optic nerve disorders, ocular degenerative, metabolic or genetic diseases and tumors. These will be studied using light microscopy, electron microscopy, confocal microscopy, immunohistochemistry, molecular pathological including polymerase chain reaction and in situ hybridization, as well as measuring the functions of cellular organelles, e.g., mitochondrial function. Lymphocytes in the peripheral blood as well as other involved biopsied tissues and ocular tissue will be compared and categorized by disease. Cytokines, chemokines or growth factors and/or other released molecules in the blood and ocular fluids will be also analyzed. Elucidating the relationship between the infiltrating cells, ocular resident cells, and their products in various diseases will help us to make diagnoses and increase our understanding of human ocular disorders. Patients who require eye surgery to treat an eye disease or other disease in which the eye is involved may participate in this study. Samples of eye tissue and fluid that are normally removed and discarded during eye surgery will instead be given to researchers for study. The tissues will be examined under microscope and studied using sophisticated chemical and biological tests. Immune cells from blood samples may also be examined. These studies will help better understand and diagnose the various eye diseases and to develop more attractive therapies.

This is a Phase II Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Preliminary Efficacy of Intermittent Oral Dosing of CM082 tablets in Chinese Patients With wAMD.