Ocular vessel dilation is flow dependent and interferes with optic fissure closure. (A–D) Single plane confocal images combined with transmitted light image of eyes of normal Tg(kdrl:EGFP) embryos (A and C) and lmo2vu270/vu270; Tg(kdrl:EGFP) embryos (B,D), uninjected (A and B) or injected with MO1-tnnt2a (C and D). Arrows point at GFP-positive endothelial cells (green) in close contact with optic fissure margins. (A′–D′) Images of the same embryos as in A–D. Arrows point at optic fissure margins. Embryos were treated with PTU to block pigmentation. All panels are lateral view, anterior to the left.
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