Active clinical trials for "Retinitis Pigmentosa"

The main objective of this study is to quantify vision parameters in subjects with concentric visual field constriction, and this in relation to the display on virtual reality goggles. More specifically: The maximum brightness value for visual comfort (THRESHOLD_MAX) The minimum value of the perceptible light contrast in low light perceptible (THRESHOLD_MIN) The speed of light change adaptation in the range [THRESHOLD_MAX-THRESHOLD_MIN] and [THRESHOLD_MIN-THRESHOLD_MAX].

Purpose: This prospective clinical case series aimed to evaluate the effect of suprachoroidal implantation of mesenchymal stem cells (MSCs) in the form of spheroids as a stem cell therapy for retinitis pigmentosa (RP) patients with relatively good visual acuity. Methods: Fifteen eyes of 15 patients with RP who received suprachoroidal implantation of MSCs in the form of spheroids were included. Best corrected visual acuity (BCVA), 10-2 and 30-2 visual field examination and multifocal electroretinography (mfERG) recordings were recorded at baseline, postoperative first, third- and sixth-months during follow-up.

Our aim was to assess the role and usefulness of Hyperbaric oxygen therapy in a long lasting period, assessing its efficacy on rescuing retinal photoreceptors and preserving visual function in retinitis pigmentosa.

Purpose To investigate whether the natural progression rate of retinitis pigmentosa (RP) can be decreased with subtenon umbilical cord Wharton's jelly derived mesenchymal stemcell (WJ-MSC) application alone or combination with retinal electromagnetic stimulation (rEMS). Material and methods The study included prospective analysis of 130 eyes of 80 retinitis pigmentosa patients with a 36-month follow-up duration. Patients constitute 4 groups with similar demographic characteristics. The subtenon WJ-MSC only group consisted of 34 eyes of 32 RP patients as Group1; The rEMS only group consisted of 32 eyes of 16 RP patients as Group2; The combined management group consisted of 32 eyes of 16 RP patients who received combined WJ-MSC and rEMS as Group3; The natural course (control) group consisted of 32 eyes of 16 RP patients who did not receive any treatment were classified as Group4. Fundus autofluorescence surface area (FAF-field), horizontal and vertical ellipsoid zone width (EZW), fundus perimetry deviation index (FPDI), full field electroretinography magnitude (ERG-m) and best corrected visual acuity (BCVA) changes were compared within and between groups after 36 month follow up period.

Purpose: Cystoid macular edema (CME) in retinitis pigmentosa (RP) has been managed in several ways with little success. The aim of our study was to report the use of intravitreal dexamethasone implant in a large series of patients with RP and CME. Setting: Retrospective case series. Methods: Cases were diagnosed as RP based on the classic fundus triad of bone-spicule pigment deposits (intraretinal pigmentary migration), retinal vessel attenuation, waxy pallor of the optic disc along with night blindness and attenuated ERG amplitudes (delays in rod or cone b-wave implicit times). Family history of RP and family screening for RP were important in establishing the diagnosis in eyes with some diagnostic challenge. CME was diagnosed by intravitreous fluorescein angiography IVFA and spectral domain optical coherence tomography (SD-OCT). BCVA was monitored using Snellen visual acuity chart and CME was monitored by SD-OCT on follow-up visits.

This post-approval study is being implemented to monitor the use of Argus II System in a larger US population than available within pre-approval studies. An attempt will be made to include all eligible and willing subjects implanted with Argus II System in the United States.

Early Phase I Study of the Safety and Preliminary Efficacy of Human primary Retinal Pigment Epithelial (HuRPE) Cells Subretinal Transplantation in Retinitis Pigmentosa (RP) and Leber Congenital Amaurosis (LCA) Patients

Retinitis pigmentosa (RP) is the name given to a group of inherited eye diseases that affect the retina (the light-sensitive part of the eye). RP causes the breakdown of photoreceptor cells (cells in the retina that detect light). Photoreceptor cells capture and process light helping us to see. As these cells breakdown and die, people experience progressive vision loss. There is no known cure for retinitis pigmentosa. The investigators have observed that short pulses of focused ultrasound can cause perception of light when directed to spots on the retinal surface. The investigators propose to conduct a study to determine if pulsed ultrasound will stimulate the perception of light in the absence of functional photoreceptors in people with RP

This post-market surveillance study is conducted in the European Economic Area where Argus II has been CE certified for use in outer retinal degeneration patients.

Retinitis pigmentosa is an eye disease in which there is damage to the retina. The retina is the layer of tissue at the back of the inner eye that converts light images to nerve signals and sends them to the brain.Autologous Bone Marrow derived Mono Nuclear Stem Cell (BMMNCs) is used for this condition .