[Clinical applications of ultrasound biomicroscopy in diagnosis and treatment of lens subluxation].
OBJECTIVE
To evaluate the clinical value in diagnosis and treatment of lens subluxation using ultrasound biomicroscopy (UBM).


METHODS
This study comprised 29 patients (32 eyes) that had cataract with subluxated lenses due to different causes admitted into our hospital between November 2000 and January 2002. All eyes received UBM examination preoperatively and postoperatively. Capsular tension ring (CTR) implantations were performed using different technique according to UBM examination. Then all patients received phacoemulsification and intraocular lens (IOL) implantation. The location of IOL and CTR and complications were evaluated postoperatively.


RESULTS
Different kinds of subluxated lens shown different manifestations in UBM. The degree of zonular defect can be evaluated with UBM preoperatively. With UBM examination preoperatively, extent of lens subluxation less than 1/2 quadrant in 19 eyes while more than 1/2 quadrant in other 13 eyes were observed. Postoperative UBM examination in this series shown that CTRs were holding in place except one attached to the iris root. IOLs in 29 eyes were in proper position while IOLs in 3 patients were slightly tilted.


CONCLUSIONS
The degree and extent of lens subluxation can be evaluated using UBM examinations preoperatively, which is necessary in the selection of surgical protocol. With postoperative UBM examinations, a precise observation on the actual location of CTR and IOL can be achieved to produce an objective evaluation of the surgical outcomes.
Liu
Yi-Zhi
YZ
Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China. LuoLL70@163.com
Liu
Yu-Hua
YH
Wu
Ming-Xing
MX
Luo
Li-Xia
LX
Zhang
Xin-Yu
XY
Cai
Xiao-Yu
XY
Chen
Xiu-Qi
XQ
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002387:Cataract Extraction / Q000379:methods; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007906:Lens Subluxation / Q000175:diagnosis* / Q000601:surgery*; D007908:Lens, Crystalline / Q000601:surgery; D008297:Male; D008853:Microscopy / Q000295:instrumentation; D008875:Middle Aged; D018918:Phacoemulsification / Q000379:methods; D011182:Postoperative Care; D011183:Postoperative Complications; D011300:Preoperative Care; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016896:Treatment Outcome; D014463:Ultrasonography / Q000295:instrumentation*