Falmer (ice/snow elves) are not affected by Kindred Mage nor by Animage Illusion spell perks.
Which means that the game considers Falmer neither humanoids nor animals, and they are obviously not undead/daedra/automatons.
Honestly that makes no sense, since Falmer are just humanoids (elves) who were forced to be in the caves for too long and have damaged eyesight.
Other blind people & creatures can be affected by Illusion spells normally and are affected by Kindred Mage and Animage illusion spell perks normally.
Please consider making Falmer affected by Kindred mage or by Animage illusion spell perks.
Thanks for all the work you do!