It seems to be often believed that most cases of closed-angle glaucoma present in the acute state, while chronic cases are uncommon. It was our impression that chronic closed-angle glaucoma as a presenting state is quite frequent and also that it accounts for a high proportion of patients with apparently unilateral glaucoma, i.e. one eye having pathological cupping of the disc and raised ocular tension, the other eye having a normal optic disc and ocular tension.
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Leighton et al. (1971) studied this question.
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