Changes in intraocular pressure values measured with noncontact tonometer (NCT), ocular response analyzer (ORA) and corvis scheimpflug technology tonometer (CST) in the early phase after small incision lenticule extraction (SMILE)

Table 3 Abbreviations for corneal deformation parameters

Abbreviation	Definition
AT1	Applination Time (time 1): the duration from the initiation to the moment that a cornea just deformed for the first time
ATh	Applination Time (hightest concavity): the duration from the initiation to the moment that a cornea is depressed to the highest concavity
AT2	Applination Time (time 2): the duration from the initiation to the moment that a corneal deformation just completely resumed
AL1	Applination length (time 1): the cord length recorded at the moment that a cornea just deformed for the first time
AL2	Applination length (time 2): the cord length recorded at the moment that a corneal deformation just completely resumed
AV1	Applination velocity (time 1): the instantaneous velocity recorded when a cornea just deformed
AV2	Applination velocity (time 2): the instantaneous velocity recorded when a cornea just completely resumed
Radius	Radius: the corneal radius obtained when a cornea is depressed to the highest concavity
PD	Peak Distance: the distance between the two corneal peaks recorded when a cornea is depressed to the highest concavity
DA	Deformation Amplitude: the maximum amplitude of corneal deformation recorded when a cornea is depressed to the highest concavity

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