Liu: Originally, when we started this project we envisioned the entire implant would be inside the eye ball and through a camera and then we gradually realized that the camera technology moves so quickly and also, it dissipates heat inside the eye. So, we decided to separate and we created an external unit and internal unit.
Narrator: The device is currently in second generation clinical trial.
Liu: And we are designing third and fourth generation funded by the National Science Foundation and also, the Department of Energy.
Narrator: For Science Today, I'm Larissa Branin.