Figure 4  .

Histological findings of retinal damage by grade (haematoxylin and eosin stained, × 240). (A) Grade 0. Retina of a non-operated eye. (B) Grade 1. Retina that underwent 8°C irrigation. (C) Grade 2. Retina that underwent 8°C irrigation. Proliferation of retinal pigment epithelial cells is observed. (D) Grade 2. Retina that underwent 22°C irrigation. Retinal oedema with inflammatory cell infiltration is observed. (E) Grade 3(a). Retina that underwent 22°C irrigation. (F) Grade 4(a). Retina that underwent 38°C irrigation. (G) Grade 4(b). Retina that underwent 38°C irrigation. Retina is extensively disorganised and thinned.