Effects of phacoemulsification versus combined phaco-trabeculectomy on drainage angle status in primary angle closure glaucoma (PACG).
OBJECTIVE
To document anatomic effects of phacoemulsification versus combined phaco-trabeculectomy on drainage angle in primary angle closure glaucoma (PACG).


METHODS
Indentation gonioscopy and ultrasound biomicroscopy were performed preoperatively, and then at 1 year after phacoemulsification alone or combined phaco-trabeculectomy in PACG patients.


RESULTS
Seventy-two PACG eyes of 72 patients were included in this study. Thirty-eight eyes were randomized into receiving phacoemulsification alone, whereas 34 eyes had combined phaco-trabeculectomy. The mean extent of synechial angle closure was significantly reduced from 266.4 degrees to 198.9 degrees (P<0.001) by phacoemulsification alone, and from 266.0 degrees to 227.2 degrees (P=0.03) by combined surgery. The mean angle opening distance (AOD 500) measured by ultrasound biomicroscopy was significantly increased from 208.0 to 468.0 microm (P<0.001) by phacoemulsification, and from 214.6 to 344.4 microm (P<0.001) by combined surgery. The mean trabecular-ciliary process distance was significantly increased from 824.6 to 1043.6 microm (P<0.001) by phacoemulsification, and from 800.9 to 951.5 microm (P=0.01) by combined surgery. The mean anterior chamber depth was significantly increased from 1798.6 to 3528.4 microm (P<0.001) by phacoemulsification alone, and from 1781.6 to 3297.8 microm (P<0.001) by combined surgery. Phacoemulsification alone resulted in significantly greater postoperative angle opening distance 500 (P<0.001) and anterior chamber depth (P<0.001) than phaco-trabeculectomy.


CONCLUSIONS
Phacoemulsification alone resulted in greater opening of drainage angle and greater deepening of anterior chamber than combined phaco-trabeculectomy in PACG eyes.


CONCLUSIONS
Phacoemulsification alone resulted in greater opening of drainage angle and greater deepening of anterior chamber than combined phaco-trabeculectomy in PACG eyes.
Tham
Clement C Y
CC
Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, People's Republic of China. clemtham@hkstar.com
Leung
Dexter Y L
DY
Kwong
Yolanda Y Y
YY
Li
Felix C H
FC
Lai
Jimmy S M
JS
Lam
Dennis S C
DS
D000368:Aged; D000369:Aged, 80 and over; D000869:Anterior Eye Segment / Q000000981:diagnostic imaging / Q000473:pathology*; D001082:Aqueous Humor / Q000378:metabolism*; D002386:Cataract / Q000150:complications; D005260:Female; D015812:Glaucoma, Angle-Closure / Q000378:metabolism / Q000503:physiopathology / Q000601:surgery*; D006068:Gonioscopy; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology; D008297:Male; D033401:Microscopy, Acoustic; D008875:Middle Aged; D018918:Phacoemulsification; D014065:Tonometry, Ocular; D014130:Trabeculectomy