Active clinical trials for "Retinitis"

This study evaluates the safety and effectiveness of the Intelligent Retinal Implants System (IRIS V1)

The purpose of this study is to determine the long-term effects of transcorneal electrostimulation (TcES) in patients with retinitis pigmentosa (RP). In a prior study (NCT00804102) the results of short-term stimulation showed a positive effect on the visual field and other parameters. In this study, the patients will be stimulated with either 0%, 150% or 200% of the individually determined phosphene threshold.

The purpose of this study is to expand the safety assessment of repeated applications of an electrical current from a DTL-like electrode in patients with RP.

The objective of this study is to evaluate the safety and efficacy of the retinal stimulation system by evaluating the data after chronic implantation.

Phase I/II double-masked, randomized, placebo-controlled, cross-over trial to determine effects of lutein on vision in retinitis pigmentosa, including safety and effective dosage assessment

To evaluate the safety and efficacy of foscarnet induction therapy for treatment of AIDS patients experiencing their first episode of cytomegalovirus (CMV) retinitis. To evaluate the safety and efficacy of foscarnet maintenance therapy for treatment of AIDS patients experiencing CMV retinitis.

To compare the safety and tolerance of oral ganciclovir at a double dose 3 times/day or a single dose 6 times/day to IV ganciclovir given for 20 weeks of maintenance therapy. To compare the time to progression of cytomegalovirus (CMV) retinitis between two regimens of oral ganciclovir and IV ganciclovir therapy given for 20 weeks of maintenance therapy. To describe the efficacy and safety of double dose versus single dose oral ganciclovir in patients who have a progression of retinitis while on the originally assigned maintenance treatment. To describe the safety, tolerance, and time to progression of retinitis during the 52 weeks of oral ganciclovir maintenance therapy in people with AIDS. To describe the safety and tolerance of oral ganciclovir maintenance therapy when given concurrently with antiretroviral treatment (e.g., zidovudine, ddI, or ddC). To describe survival of people with AIDS and CMV retinitis.

To demonstrate the efficacy of oral ganciclovir in preventing new cytomegalovirus (CMV) disease in AIDS patients with unilateral CMV retinitis treated with an intravitreal ganciclovir implant. To compare safety and tolerance, time to progression, quality of life, and survival among patients treated with an intravitreal ganciclovir implant, with and without oral ganciclovir, versus standard intravenous (IV) ganciclovir therapy.

To determine the clinically safe and effective dose of intravitreal ISIS 2922 alone and as an additive antiviral therapy to ganciclovir in AIDS patients with cytomegalovirus (CMV) retinitis.

To evaluate the effect of MSL 109, human monoclonal anti-cytomegalovirus (CMV) antibody, on time to progression of CMV retinitis. To determine the safety and pharmacokinetic profile of MS 109. To evaluate the relationship between pharmacokinetic measurements of MSL 109 and efficacy and virologic markers. Therapeutic agents currently available for CMV retinitis are limited by their inherent toxicities and short half-lives which require frequent intravenous dosing. Alternatively, MSL 109 has demonstrated safety and effectiveness in neutralizing CMV isolates at concentrations easily maintained in AIDS patients.