Visual Performance of Tecnis ZM900 Diffractive Multifocal IOL after 2500 Implants: A 3-Year Followup

Table 4

Spherical equivalent in different periods during followup.

	PREOP	3 months	6 months	12 months	24 months	36 months
SE Myopia
$N$	555	541	652	603	159	28
% of patients	22.2	21.64	26.11	24.31	20.75	21.87
Mean (D)	−2.7	−0.42	−0.46	−0.44	−0.40	−0.37
SE Emmetropia
$N$	97	760	755	786	299	54
% of patients	3.88	30.40	30.23	31.69	39.03	42.18
SE Hyperopia
$N$	1848	1199	1090	1090	308	46
% of patients	73.92	47.96	43.65	43.95	40.20	35.93
Mean (D)	+2.01	+0.51	+0.46	+0.43	+0.42	+0.43

SE: spherical equivalent.