The phrase "blink eye" can be substituted with a variety of synonymous phrases that convey a similar meaning. Some examples include "wink," "flutter eyelashes," "bat an eye," and "twitch eyelid." Each of these phrases implies a quick and fleeting action, often associated with surprise, flirtation, or amusement. Depending on the context, one phrase may be more appropriate than another, but all suggest a momentary action that draws attention to the eyes. So next time you want to describe a fast movement of the eyelids, consider using one of these synonyms for "blink eye" to add variety and color to your writing.