Hi Jaewon, we are using Monkeylogic for out primate recordings, but found it too expensive to completely recreate the set-up for recordings with humans. We want to use the Tobii Pro Fusion, which records at 250Hz and communicates via USB-C or USB-A. It does have a documented SDK for both C and Matlab here. We could possibly do some work arounds, but Tobii does have several high frequency eye tracby bcorr - Questions and Answers