View clinical trials related to Macular Degeneration.
Filter by:The Optical Coherence Tomography (OCT) is a non-contact, non invasive method to examine the retina by providing cross-sectional scans through the retina. Measurements of the retinal thickness based on automatically set border lines created by threshold algorithm provide information concerning the amount of intraretinal fluid and activity of the lesion. In this study the reproducibility of retinal thickness measurements in patients suffering from age-related macular degeneration performed by two independent examiners of two examinations of the same day but performed in a time interval of at least two hours should be evaluated. Using the macular thickness program of stratus OCT, 6 radial lines through the center of the foveal avascular zone are performed, Differences between the first and second measurement will be investigated by a 95% confidence interval, a Bland-Altman plot (with corresponding regression analysis) and a random effect model with time, examiner and diagnosis as fixed factors. Although threshold algorithm failures and fixation problems are common in age-related macular degeneration evidence of reproducibility and repeatability of maximum retinal thickness is expected.
Choroidal neovascularisation (CNV) in age-related macular degeneration is one of the major causes of blindness in the western world. It is already known that the vascular endothelial growth factor (VEGF) plays a major role in the development of CNV. Photodynamic therapy (PDT), subretinal surgery, and intravitreal injection of VEGF- inhibitors are the common treatments. These methods are either very invasive or need to be repeated several times over long periods of time in order show some effect. Furthermore PDT can only be performed in eyes with pigment epithelium detachments (PED) of maximum 50% of the avascular zone, while intravitreal injections can lead to endophthalmitis and acute glaucoma. A systemic treatment, which would only need to be administered 3 times within 6 weeks would be a major effort in macular degeneration therapy.
Age-related macula degeneration (AMD, encompassing both dry and wet form), the late stage of Age-related maculopathy (ARM), is the leading cause of blindness in many developed countries in older persons (usually over 60 years of age). Visual compromise rises exponentially after the age of 70 with a 5-year incidence of around 1%. Studies have shown a possible protective effect of lutein on progression of AMD, where visual acuity improves after increased lutein intake. The incidence of bilateral AMD in persons with unilateral late ARM observed over a period of 10 years is over 50% with a 2.1-2.8% overall incidence in the study population. Blue light hazard (excitation peak 440 nm) was shown to have a major impact on photoreceptor and RPE function inducing photochemical damage and cellular apoptosis, leading to retinal degeneration in an animal study. The current belief is that lutein accumulated in the macular region helps in the prevention of blindness by absorbing blue light and protecting the retina from oxidative stress. With the lipid matrix of the egg yolk being a proven vehicle for the efficient absorption of dietary lutein, it might be possible to increase plasma levels of lutein to therapeutic levels and control or prevent AMD. This, the investigators hope, will be accomplished by means of filtering out harmful blue light and the scavenging of free radicals by lutein and zeaxanthin.
Single agent anti-VEGF therapies such as ranibizumab have shown great promise and have set the standard for visual outcomes in treating wet macular degeneration. However, they need to be administered frequently by intraocular injections with the attendant risk of endophthalmitis, lens damage, retinal detachment, and vitreous hemorrhage. The purpose of this trial is to see if using photodynamic therapy in combination with ranibizumab will decrease the number of treatments with ranibizumab.
Rollover study for subjects in prior VEGF Trap-Eye Phase I and II studies. Primary objective is to assess long-term safety and tolerability of continuing intravitreal treatment in subjects with wet age-related macular degeneration.
To assess the CNV treatment effect of PDT with verteporfin in combination with IVTA using reduced fluence compared to the standard fluence.
Because a possible synergism of radiation and inhibitors of vascular endothelial growth factor has been shown in cancer patients and patients with wet macular degeneration, this pilot study is being conducted to determine whether treating wet macular degeneration with a combination of Lucentis and proton beam irradiation is safe. Lucentis is an inhibitor of vascular endothelial growth factor which was recently FDA approved for treatment of wet macular degeneration. It appears to be the most effective therapy thus far for wet macular degeneration among all drugs FDA approved for this condition. If no major safety issues are associated with this combination therapy, a larger study will be conducted to determine whether this combination therapy is more effective than Lucentis monotherapy. l
The study will evaluate the safety and efficacy of the intravitreal implant of dexamethasone with Anti-VEGF treatment vs. Anti-VEGF alone (with sham dexamethasone injection) in patients with subfoveal choroidal neovascularization secondary to age-related macular degeneration.
This study is a phase 3, double-masked, randomized, study of the efficacy and safety of VEGF Trap-Eye in patients with neovascular age-related macular degeneration. Approximately 1200 patients will be randomized in the US and Canada.
Wet age-related macular degeneration (AMD) is caused by the formation and growth of abnormal blood vessels (angiogenesis) in the retina. The new blood vessels have fragile walls and can leak fluid into the retina. The build-up of fluid (edema) under the macula can distort vision or cause vision loss. TG100801 is a topical (eye drop) therapy that has been shown to inhibit ocular angiogenesis, vascular leak, and inflammation in laboratory studies. The primary purpose of this pilot study is to evaluate the ability of topical administration of TG100801 to reduce the amount of fluid in the retina in patients with AMD following 30 days of treatment. An additional objective is to evaluate the safety of TG100801 in patients with AMD.