Dilation

2 clues
A swell occurrence?
Action taken with pupils, at times
Similar answers:
Abbreviation
Abbreviations
Abducktion
Abduction
Aberration
Aberrations
Abjuration
Ablation
Ablution
Abolition
Abolitions
Abomination
Abortion
Abovementioned
Abridgeddiction
Absenceofmotion
Absolution
Absorption
Abstentions
Abstraction