reverse pupillary block

reverse pupillary block

increased resistance to flow of aqueous humor through the pupil from the anterior chamber to the posterior chamber, leading to posterior bowing of the peripheral iris against the zonules; a possible mechanism for pigmentary glaucoma.

re·verse pu·pil·lar·y block

(rē-vĕrs' pyū'pi-lar-ē blok)
Increased resistance to flow of aqueous humor through the pupil from the anterior chamber to the posterior chamber, leading to posterior bowing of the peripheral iris against the zonules; a possible mechanism for pigmentary glaucoma.
References in periodicals archive ?
sup][21],[22],[23],[24],[25] As secondary open-angle glaucoma, PG has much in common with primary open-angle glaucoma (POAG) in clinical manifestations and treatment principle except for laser iridoctomy to eliminate the reverse pupillary block.
In the contralateral eyes of the enrolled patients, either trabeculectomy or laser peripheral iridoctomy was performed to eliminate reverse pupillary block, and the iris recovered to flat or regular.
The iridectomy breaks down the reverse pupillary block by communicating the AC and PC, after which the iris returns to be flat or regular and departs from the anterior surface of the crystalline lens and zonules, preventing more pigment granules to liberate from the IPE layer of the iris.