Objective To investigate the morphology changes of anterior segment in acute primary angle closure glaucoma (APACG) after phacoemulsification using the Pentacam and anterior segment optical coherence tomography (AS-OCT).
Methods Thirty-ninepatients (39 eyes) with APACG accompanied with cataract were treated with phacoemulsification from July in 2010 to December in 2010 in Zhongshan Hospital of Sun Yet-sen University. All patients were examined by Pentacam and AS-OCT preopetive and postoperative 3 month.Data included intraocular pressure (IOP), central anterior chamber depth (CACD), peripheral anterior chamber depth (PACD), anterior chamber volume (ACV), pupil diameter (PD), and anterior chamber angle (ACA) of cross-section photographs.
Results Mean IOP decreased from 33.08±5.21mmHg to 16.36±3.44mmHg (t=20.644, P=0.000) preoperative and postoperative 3 month; CACD measurements increased from 1.79±0.20mm to 3.41±0.38mm (t=36.191, P=0.000). PACD deepened from 0.82±0.12mm to 1.81±0.20mm (t=40.732, P=0.000). ACV increased from 74.10±9.94mm to 149.72±17.12mm (t=54.921, P=0.000). Inferior ACA widened from 24.03°±3.50° to 43.29°±3.92° (t=55.489, P=0.000), and from 23.02°±2.96° to 42.36°±4.61° (t=43.291, P=0.000) in nasal direction. Superior ACA widened from 21.62° ± 3.04° to 39.66°±3.53° (t=43.511, P=0.000), and from 22.88°±2.87° to 41.21°±3.81° (t=44.930, P=0.000) in temporal direction. PD before and after phacoemulsification were 3.06±1.32mm and 3.00±1.21mm (t=1.177, P=0.247) respectively, which showed no statistic difference.
Conclusions Phacoemulsification can widen the angle and lessen angle crowding in APACG patients. The Pentacam and AS-OCT allowed easy, fast, automatic and noncontact quantification of the anterior chamber parameters.