In LSC, specificity is marked with eyes wide open, sucking the cheeks in, pulling the mouth ends down, and sometimes in combination with a shrug. When the indefinite noun phrase corresponds to a non-specific discourse referent, which is therefore not identifiable by the signer and does not belong to a restricted set, the articulation of the non-manual is aligned with a particular eye gaze. A non-fixed eye gaze towards a high location is used, as shown below, and the corresponding darting eye gaze is aligned with the noun phrase.
Non-fixed eye gaze
(recreated from Barberà, 2012: 301)