What is another word for eyeholes?
Pronunciation: [ˈa͡ɪhə͡ʊlz] (IPA) 
The word eyeholes is relatively uncommon, but it refers to the openings in a mask or costume that allow a person to see through. There are several synonyms for eyeholes, including eyeslots, oculi, peepers, and ocular ports. These words are often used when describing the openings in helmets, masks, and other protective gear that allow the user to see while still remaining protected. Other terms that can be used to describe eyeholes include eye apertures, vision slits, and eye cut-outs. No matter which synonym is used, the key element in each case is the opening that allows the wearer to see through their mask or helmet.
