foreign-body sensation
Medical term for the feeling that something is stuck or present where it shouldn't be, such as in the eye, throat, or under a contact lens.
When I first put in contact lenses, I had a foreign-body sensation.
If the foreign-body sensation in your eye persists, you should see an ophthalmologist.
Compound of 異物 (foreign body) + 感 (sensation). A straightforward modern medical term.