IPA: /ˈaɪləs/
KK: /ˈaɪləs/
Lacking eyes or the ability to see.
The eyeless creature moved through the dark cave without any trouble.
Eyeless → It is formed from "eye" (from Old English "ēage", meaning the organ of sight) and "-less" (meaning without). The word "eyeless" means without eyes or lacking the ability to see.
Think of being 'without' ('-less') the 'organ of sight' ('eye') — that's why eyeless means lacking eyes.