Glaucomatocyclitic crisis is a condition with self-limited recurrent episodes of markedly elevated intraocular pressure (IOP) with mild idiopathic anterior chamber inflammation. It is most often classified as secondary inflammatory glaucoma.
In 1948, Posner and Schlossman first recognized glaucomatocyclitic crisis and described the features of this syndrome.  For this reason, the entity is often termed Posner-Schlossman syndrome (PSS).
Posner and Schlossman identified the following features  :
Recurrent episodes of mild cyclitis
Duration of attack varying from a few hours to several weeks
Signs of a slight decrease in vision, elevated IOP with open angles, corneal edema with a few keratic precipitates, heterochromia with anisocoria, and a large pupil in the affected eye
Normal visual fields
Normal optic disc
Normal IOP and outflow facility, and all provocative tests normal between episodes
Since this original description, other cases attributed to glaucomatocyclitic crisis have been found to deviate from these criteria.  For instance, some patients with glaucomatocyclitic crisis have abnormal aqueous humor dynamics and may have an underlying primary open-angle glaucoma (POAG). 
Additional features that are now recognized are as follows:
Almost exclusively, this condition affects individuals aged 20-50 years.
The rise of IOP is out of proportion to the severity of the uveitis, and this rise in IOP precedes the identifiable inflammatory reaction, often by several days.
Episodic changes in the trabecular meshwork lead to impairment of outflow facility and result in an elevation of IOP. These changes are accompanied by mild intraocular inflammation. In the acute phase of PSS, optic nerve head parameters and retinal flow rates were altered; however, all returned to normal without any permanent damage after resolution of the elevated IOP. Electroretinogram studies in the acute phase demonstrate a selective reduction in the S-cone b-wave. 
Glaucomatocyclitic crisis is a rare condition.
In Finland, the incidence is 0.4 and the prevalence is 1.9 per 100,000 population. 
In Japan, among 2556 cases of uveitis, 1.8% had PSS. 
This condition almost exclusively affects individuals aged 20-50 years. However, there are reports of rare episodes in individuals older than 60 years as well as in adolescence. 
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