The picture of retinal detachment following cataractextraction is studied in 86 cases of aphakic detachment, and the hypothesis that two different forms of detachment exists is proposed. In order to study this hypothesis the time-interval, the refraction and the type of tear is analysed. The results seem to indicate that two forms are present. The first one, the so-called "non: aphakic" detachment, appears in the predisposed eye and will occur after a short time-interval. The other form, the "true" aphakic detachment appears at a later stage and though this form more often shows no clear-cut tear the prognosis seems to be somewhat better.