Understandably, considering most other red light hair growth devices use some number of lasers, users and potential users of the Revian Red system may have concerns about damaging their eyes. Please note that Revian does not use lasers. Rather, the Revian Red system uses 100% LEDs. If you remove the cap from your head during treatment, the red LEDs will turn off automatically and the treatment will be paused. If for any reason you were to look directly at the LEDs while they are activated, they will be bright and may not be comfortable, but they will not damage your eyes.