Do you know how to stage an angle closure?

Pearls Manager: Andrew Tatham

Primary Angle-Closure Suspect (PACS)
- Two or more quadrants of iridotrabecular contact (lTC), normal IOP, no PAS, no evidence of glaucomatous optic neuropathy (GON)

Primary Angle-Closure (PAC)
- Iridotrabecular contact resulting in PAS and/or raised IOP. No evidence of GON

Primary Angle-Closure Glaucoma (PACG)
- Iridotrabecular contact causing GON; PAS and raised IOP may be absent at the time of initial examination

EGS Guidelines, Page 101 - Foster PJ, Buhrmann R, Quigley HA, Johnson GJ. The definition and classification of glaucoma in prevalence surveys. Br J Ophthalmol 2002;86(2):238-42.