This article has no abstract; the first 100 words appear below.

On June 30, 2006, the Food and Drug Administration (FDA) approved ranibizumab — which is manufactured by Genentech and marketed as Lucentis — for the treatment of neovascular age-related macular degeneration. Ranibizumab is a fragment of a recombinant monoclonal antibody (see Figure 1) that binds to and inhibits all the biologically active forms of vascular endothelial growth factor A. Administered by injection into the vitreous cavity (see Figure 2), ranibizumab prevents vision loss and improves visual acuity, with few serious adverse effects (as indicated in the reports by Rosenfeld et al. and Brown et al. in this issue of the Journal, pages . . .