Table 2.

Intensity of pain, mean (SD).

Time points	Clonidine (n = 20)	Placebo (n = 20)	P
Control	0.4 (1.0)	0.2 (0.7)	0.77
5 min	0.3 (0.9)	0.2 (0.7)	0.79
15 min	0.3 (0.9)	0.2 (0.7)	0.79
Blepharostat	0.3 (0.9)	0.2 (0.7)	0.79
Incision of the cornea	0.3 (0.9)	0.2 (0.5)	0.99
Capsulorhexis	0.5 (1.1)	0.9 (1.3)	0.43
Phacoemulsification	1.4 (1.6)	3.9 (3.2)	0.02
Irrigation-aspiration	1.4 (2.0)	3.1 (2.7)	0.04
Lens implantation	1.7 (2.0)	3.6 (2.4)	0.01
End	1.1 (1.7)	1.8 (1.8)	0.20

Mann-Whitney test.