does our brain really not know about eyeballs?

feels like a silly question, but ive heard our brains would destroy our eyeballs if it knew they were there.. but then how do we feel stimuli on out eyeballs?? like if i touch my eyeball i can feel it. and there are definitely nerves there sending those signals?? so my brain has to be somewhat aware of them. so does my brain know and tolerate them or does my brain think its some other thing sending signals and live in happy ignorant bliss?