Comparison of Intraocular Pressure before and after Laser In Situ Keratomileusis Refractive Surgery Measured with Perkins Tonometry, Noncontact Tonometry, and Transpalpebral Tonometry

Table 1

Demographic characteristics of the participants in the study.

Parameter	LASIK
Number of eyes (patients)	57 (57)
Age (years); (mean (SD))	34.88 (8.86)
Age range (years)	22, 53
Gender (male/female)	27, 30
Axial length (mm); (mean (SD))	24.76 (0.88)
Sphere presurgery (D); (mean (SD))	−2.99 (1.24)
Cylinder presurgery (D); (mean (SD))	−0.56 (0.40)
	91.98 (59.58)
	Presurgery	Postsurgery
Flat (D); (mean (SD))	43.44 (1.47)	40.92 (1.32)
Steep (D); (mean (SD))	43.62 (1.42)	41.12 (1.54)

Presurgery versus postsurgery. . Student’s paired -test. For details see Section 2.