Figure 2. Matrix metalloproteinase 9
(MMP-9) expression in the vitreous is predictive of subretinal
fluid (SRF) accumulation . Here it can be seen that when MMP-9
expression levels are below 1.0 patients generally have lower
levels or no SRF accumulation, but when MMP-9 levels go above
1.0, patients have higher levels of SRF accumulation.