Before revision:  Current camera-based eye tracking systems , however, are fundamentally limited by their bandwidth , forcing a tradeoff between image resolution and framerate, i. e. between latency and update rate .
After revision:  Current camera-based eye tracking systems , however, are fundamentally limited by their bandwidth , forcing a tradeoff between image resolution and framerate, i. e. between latency and power limitations, constraining data acquisition speed to 300 Hz realistically. This obstructs the use of mobile eye trackers to perform, e.g., low latency predictive rendering, or to study quick and subtle eye motions like microsaccades using head-mounted devices in the wild .