Table 2.

Intra-operative oarameters

Parameter	Group 1 n = 19	Group 2 n = 19	Group 3 n = 18	One-way ANOVA, F-Value	P value	Post hoc ANOVA, (Scheffe's test)
Mean phaco energy (%)	0.28 ± 0.06	0.31 ± 0.06	0.38 ± 0.09	6.75	0.0024	I Vs III: p = 0.03 II Vs III: p = 0.05
Mean phaco time (min)	2.0 ± 1.0	1.8 ± 0.8	2.1 ± 0.7	0.026	--	--
Effective phaco time (sec)	33.8 ± 17.7	36.1 ± 20.4	49.5 ± 23.1	3.31	--	--
Mean total surgical time (min)	12.9 ± 3.3	15.2 ± 3.5	16.5 ± 3.6	5.06		1 Vs III: p = 0.011
OVD removal time (sec)	66.6 ± 11.2	45.1 ± 9.0	55.47 ± 6.6	26	0.0001	I Vs II: p = 0.0001 I Vs III: p = 0.003 II Vs III: p = 0.006

OVD = Ophthalmic viscosurgical device

min = minutes

sec = seconds