Scientists have developed an experimental treatment combining gene therapy with specialised goggles to restore limited vision in people affected by retinitis pigmentosa, a genetic disease that progressively destroys the retina’s light-sensitive cells. The treatment uses optogenetics, a technique that introduces a light-sensitive protein called ChrimsonR into retinal ganglion cells, enabling them to respond to light. Special goggles capture visual information and convert it into pulses of amber light that stimulate these modified cells, allowing visual signals to reach the brain. In a study, seven of ten participants experienced improved light sensitivity, demonstrating the potential of this approach to partially restore sight.

The results represent a promising advance in treating inherited blindness. Four of eight participants who completed behavioural testing could perform basic visual tasks, such as locating doorways or following lines, while wearing the goggles. However, the restored vision remains limited, with participants unable to recognise faces or read text. The treatment also requires an intact optic nerve to transmit visual information to the brain, restricting its suitability for certain forms of blindness. Despite these limitations, researchers consider the findings an important proof of concept and hope that further improvements will enable more sophisticated visual abilities.
More information:
https://www.sciencenews.org/article/cells-detect-light-blind-vision



