Table 2.

Regression analysis.

	Coefficients	P-value
Intercept	2.8	0.1
Noncontact tonometer	0.5	2.28E−40
Schiotz tonometer	0.4	7.33E−17
Age	0.01	0.4
Gender	0.8	0.00
Central corneal thickness	−0.01	0.02
Laterality of eye	−0.63	0.01

Dependent variable- IOP by Perkin’s tonometer.

Independent variable-IOP by NCT, Schiotz tonometer, age, gender, central corneal thickness and laterality of eye.