This is totally weird for me. So I am using video tutorials and i have reached cutting out the secondary parts.
I began cutting the eyes from the head and now they say i have to cut the whites out from the eyes. So when i tried holding ALT to select only the eye whites, it would not grab it. So i tested it out on another character that i built and it worked. It also worked on the sample package (karate rabbit) from the tutorials.
Anyway, when i returned to my character, and selected other parts, like the hair, the cheeks, the nose etc., it worked…just not response in the eyes.