View clinical trials related to Blindness.
Filter by:This is a randomized, pilot interventional study in participants with visual field deficit (VFD) caused by cortical lesion. Damage to the primary visual cortex (V1) causes a contra-lesional, homonymous loss of conscious vision termed hemianopsia, the loss of one half of the visual field. The goal of this project is to elaborate and refine a rehabilitation protocol for VFD participants. It is hypothesized that visual restoration training using moving stimuli coupled with noninvasive current stimulation on the visual cortex will promote and speed up recovery of visual abilities within the blind field in VFD participants. Moreover, it is expected that visual recovery positively correlates with reduction of the blind field, as measured with traditional visual perimetry: the Humphrey visual field test. Finally, although results will vary among participants depending on the extension and severity of the cortical lesion, it is expected that a bigger increase in neural response to moving stimuli in the blind visual field in cortical motion area, for those participants who will show the largest behavioral improvement after training. The overarching goals for the study are as follows: Group 1 will test the basic effects of transcranial random noise stimulation (tRNS) coupled with visual training in stroke cohorts, including (i) both chronic and subacute VFD stroke participant, and (ii) longitudinal testing up to 6 months post-treatment. Group 2 will examine the effects of tRNS alone, without visual training, also including chronic and subacute VFD stroke participants and longitudinal testing.
This research is aimed to address one of the big gaps in the current vision rehabilitation protocols for people with profound visual impairment by evaluating a multisensory approach. There are a growing number of clinical trials that recruit people with end-stage eye diseases and the rehabilitation plan following various treatments is not clear. It is important to address this in order to maximize the efficacy of such treatments and to improve the quality of life in people with profound visual impairment.
PQ-110-005 (BRIGHTEN) is an open-label, dose escalation and double-masked, randomized, controlled study evaluating safety and tolerability of sepofarsen administered via intravitreal (IVT) injection in pediatric subjects (<8 years of age) with LCA10 due to the c.2991+1655A>G mutation over 24 months of treatment.
The purpose of the study is to evaluate the effectiveness and safety of the BrainPort® Vision Pro, an electronic oral assistive device, in the performance of daily tasks by French persons who have residual vision limited to light perception or less in both eyes.
The purpose of this study is to determine the feasibility of producing artificial vision in persons with blindness. Study participants will have wireless electrical stimulators implanted into the cortical vision processing areas of their brains. The ability of the participants to perceive artificial vision in response to electrical stimulation will be assessed.
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
Blindness and visual impairment severely impact the visual health and life quality of people, particularly the 2.566 million senior citizens aged at 65 and above in Shanghai. The main reason is uncorrected refractive error, of which, 62.1% can be solved through refractive correction. For this reason, the uncorrected refractive errors of 154,000 senior citizens in Shanghai can be taken as a priority among the public health issues to prevent blindness. Now, with the aim to reduce the prevalence rate of blindness and visual impairment, it is planned to establish a public health service mechanism in terms of refractive error screening and correction for the elderly by relying on Shanghai's three-level (city-district-community) eye diseases prevention network, using proper refractive correction technology, and moving related services forward to communities in order to screen, identity, and correct blindness and visual impairment caused by refractive errors as early as possible.
To accurately control body movements to interact with objects, our brain needs representations of the body and the nearby space. The broader aim of this research project is to study the behavioural and physiological mechanisms involved in the constitution of these representations, to identify their neural bases, in order to better understand the dysfunctions in the context of neurological or developmental disorders.
This study will evaluate the use of autologous bone marrow derived stem cells (BMSC) for the treatment of retinal and optic nerve damage or disease.
The objective of this study is to evaluate the usefulness of a cortical visual prosthesis based on intracortical microelectrodes to provide a limited but useful sense of vision to profoundly blind. This pilot study will provide important information on safety and efficacy for the development of an useful cortical visual neuroprosthesis for the blind.