# Nature Medicine: blind patient partially regains sight after GS030 optogenetic therapy

Canonical page: https://technooptimist.io/stories/nature-medicine-blind-patient-partially-regains-sight-after-gs030-cb590e02
Date: 24 May 2021
About: [GenSight Biologics](https://technooptimist.io/companies/gensight-biologics.md) · [GS030 optogenetic therapy](https://technooptimist.io/neurotech/gs030.md)
Original source: https://sorbonne-universite.fr/en/news/optogenetic-methods-restore-partial-vision-blind-patient

A team led by José-Alain Sahel and Botond Roska reported that a man blind from retinitis pigmentosa could perceive, locate and count objects with his treated eye after GS030, when wearing the goggles. It is the first reported partial functional recovery in a neurodegenerative disease after optogenetic therapy.

## Key facts

- Gene for ChrimsonR, which responds to amber light, delivered to the eye by an AAV vector
- Goggles with a camera project the scene onto the retina as amber light
- Without the goggles the patient could not complete the tests
- Roska: proof of concept; Sahel: it will take time before patients can be offered it

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