The file features changed eye colors for multiplayer characters. 28 natural and 8 unnatural.
I wasn’t able to catch all of the colors in Rockstar Editor but there are various shades of brown, green and blue.
To install, simply drag and drop the mp_eye_colour into:
mods\x64w.rpf\dlcpacks\mpbusiness\dlc.rpf\x64\models\cdimages\mpbusiness_ped_mp_overlay_txds.rpf\
Credits:
Munikuyo
ts4-parise for the TS4 CC.