Presence of at least 2 of the following symptoms: ocular or periocular pain, nausea and/or vomiting, an antecedent history of intermittent blurring of vision with haloes.
Presenting intraocular pressure (IOP) >21 mmHg.
Presence of at least 3 of the following signs: conjunctival injection, corneal epithelial edema, mid-dilated unreactive pupil, and shallow anterior chamber.
Developed for the use in prevalence surveys. It identifies 3 stages in the natural history of angle-closure:
Primary angle-closure suspect: an "occludable angle," with normal IOP, optic disk, and visual field, without evidence of peripheral anterior synechiae (PAS).
Primary angle-closure: an "occludable angle" with either raised IOP and/or primary PAS. Optic disk and field normal.
Primary angle-closure glaucoma: primary angle closure with evidence of glaucomatous damage to optic disk and visual field.
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