Vitreous MMP-2 was not significantly different between the IOL group (2.3 ± 0.79 ng/ml) and the uveitis group (2.5 ± 0.58 ng/ml, P = 0.42), whereas vitreous MMP-9 was significantly lower in the IOL group (1.0 ± 1.07 ng/ml) than in the uveitis group (8.3 ± 7.04 ng/ml) (P < 0.05). This evidence concerns the gene MMP2 and uveitis.