What do you understand by Optogenetics? Discuss its applications in healthcare.

Optogentics uses techniques from optics and genetics to control and measure the activities of particular cells of living tissue, typically neurons. 
Scientists are using the technology to make an animal to perform required physical activity by controlling its brain cells.
The optogenetic approach offers for the future an enormous potential for basic research, analyse neural networks, restoring vision loss, mapping of brain and behavior, Parkinson’s disease, Epilepsy and also in the future, gene therapy with the optogenetic tools may also be a possibility.