Fax's eyes widened imperceptibly at mention of a Search.

Spock's eyes widened almost imperceptibly.

An inch in from the edge of the disk the track widened imperceptibly, to allow another groove between the coils that carried the rumba.

Valdyr's eyes widened almost imperceptibly and he stopped dead in his tracks, suddenly wary.

The cracks around the airlock widened almost imperceptibly.

Jesse's eyes widened almost imperceptibly.

"Thank you, sir, but I was designed to-" Abruptly, Data fell silent, his luminous golden eyes widening imperceptibly as the displays on the panel before him flashed a tentative message.

Data's eyes widened imperceptibly.