eyeblink
Rapid lid closure
An eyeblink is a single closing and opening of the eyelid—the reflex that keeps eyes moist and protected.
The word emphasizes brevity: It happened in an eyeblink.
As a modifier, eyeblink describes extremely short durations: eyeblink reflexes, eyeblink response times.
Brief one-eyed closure
- flutterRapid light movement
- batFlying mammal or sports club
- flickerUnsteady, brief light
- squintPartly close eyes
signal · coy · flirtatious · playful · knowing · conspiratorial · suggestive · tease
Briefest unit of time
- split-secondFraction of a moment
- nanosecondOne-billionth second unit
- millisecondTiny time unit
- microsecondOne-millionth of a second
jiffy · flash · twinkling · trice · momentary · fleeting · transitory · ephemeral
Of the eye's outer layer
- involuntaryNot under conscious control
- protectiveServing to guard
- autonomicSelf-regulating without awareness
- stimulusWhat prompts a reaction
response · tears · eyelashes · pupil · conjunctiva · glare · neural · oculomotor
Measured speed or charge
- frequencyRate of recurrence
- intervalDuration between two points
- conditioningLearned behavioral adaptation
- PavlovianAutomatically triggered by association
latency · neurological · baseline · spontaneous · voluntary · tracking · detection · sensor
wink
Brief one-eyed closure
squint · signal · coy · flirtatious · playful · knowing · conspiratorial · suggestive · tease · sly
instant
Briefest unit of time
- split-secondFraction of a moment
- nanosecondOne-billionth second unit
- millisecondTiny time unit
microsecond · jiffy · flash · twinkling · trice · momentary · fleeting · transitory · ephemeral · brief
corneal
Of the eye's outer layer
- involuntaryNot under conscious control
- protectiveServing to guard
- autonomicSelf-regulating without awareness
stimulus · response · tears · eyelashes · pupil · conjunctiva · glare · neural · oculomotor · startle
rate
Measured speed or charge
- frequencyRate of recurrence
- intervalDuration between two points
- conditioningLearned behavioral adaptation
Pavlovian · latency · neurological · baseline · spontaneous · voluntary · tracking · detection · sensor · biometric
eyeblinkstare
Prolonged fixed gaze
gaze · fixed stare · steady gaze · glare · watchful eye