- In case of occult neovessels, proof required of recent development of the lesion: loss of VA of at least 5 letters ETDRS (equivalent one line) in the last 3 months OR appearance of a subretinal heamorrhage OR increase in the size of the lesion (> 10%) using fluoresceinic angiography during the last month by comparison with the last 3 months OR appearance of OCT criteria of macular oedema type, serous separation of neuro-epithelium, separation of the pigmented epithelial during the last month