[Retina and qualitative abnormalities of hemoglobin (author's transl)]

The classification of the main qualitative abnormalities of hemoglobin is recalled. The five phases of the retinal changes caused by drepanocytosis are described. Their pathogenesis is explained. The specialized treatment is photocoagulation after cryokiming coagulation has been discarded. Nowadays laser is used but the timing and the indications for this treatment are not yet fixed.