Advances in the understanding of primary angle-closure as a cause of glaucomatous optic neuropathy.

In the last few years the classification of angle-closure glaucoma has undergone revision. This is a result of population research in regions where angle-closure glaucoma is a major cause of blindness. Several studies have shown that most cases of angle-closure that cause glaucomatous optic neuropathy occur without the symptoms that Western ophthalmologists associate with episodes of acute angleclosure. We have, therefore, started using the classification scheme detailed in Table 1 in our research. Other ocular tissues may be damaged by angle-closure. These are illustrated in Fig. 1. Damage to different structures should be specifically described when recording case details.