There was a spectrum of anatomical variations seen in the subgroups of ACG. Acute ACG eyes expressed an extreme shift of anatomical features away from normal, especially, smaller corneal diameters, leading to a large mobile lens in an already crowded anterior segment. This predisposed them to a severe relative pupillary block, and to a form of ciliary block glaucoma. Chronic ACG eyes were less divergent from normal and therefore could have suffered a milder form of the same kind of angle closure, but over a more prolonged period. Subacute ACG eyes deviated least from controls, and therefore exhibited mild signs and spontaneous resolution. Further work is required to elucidate completely the pathophysiology that leads to ACG.

There is a significant decrease in the corneal endothelial cell density in eyes that have had an acute attack of angle closure glaucoma and in eyes with chronic PACG. The endothelial cell population in eyes with sub-acute PACG and in the fellow eyes of all subtypes of PACG is not significantly different from the normal population.

Small foreign bodies with relatively little mass and large surface area can evade the normal protective mechanisms for removal of a foreign body and give rise to a chronic inflammatory response.

No abstract

Abstract. Pigmented cysts in the anterior chamber, fixed or free floating, are considered to be unusual but not very infrequent.1"4 However, most of these cases usually do not need any treatment other than a periodic observation.5 We report the surgical removal of an iris pigment epithelial cyst floating freely in the anterior chamber. The reason for surgical removal was, disturbance in near vision being caused by movement of the cyst across the visual axis. This specific symptom of disturbed near vision, to the best of our knowledge, is a rare indication for surgery that has not been pointed out earlier. Histo pathological confirmation of the clinical diagnosis was also obtained. [Ophthalmic Surg Lasers 1999;30:223-225-]