blinking eyes (animation)
Animation jargon for the rapid opening and closing of a character's eyes, often used for comedic or exaggerated effect. Related to the onomatopoeia パチパチ.
See also: パチパチ
In this scene, they use a lot of eye blinks to express the character's emotions.
Animators are particular about the timing of eye blinks.
Compound of 目 (eye) and パチ, from the onomatopoeia パチパチ (blinking). The exact derivation is uncertain, but it likely originated in animation production.