Distance Stereoacuity in Children with Intermittent Exotropia Using B-VAT II Video Acuity Tester.

Roh, Young Bae; Kim, Cheol Min; Oum, Boo Sup; Lee, Jong Soo

Original Article

Journal of the Korean Ophthalmological Society 1998;39(3):578-582.
Published online March 1, 1998.

Distance Stereoacuity in Children with Intermittent Exotropia Using B-VAT II Video Acuity Tester.

Young Bae Roh, Cheol Min Kim, Boo Sup Oum, Jong Soo Lee

Department of Ophthalmology, College of Medicine, Pusan national University, Pusan, Korea.

간헐외사시에서 B-VAT II Video Acuity Tester 를 이용한 원거리입체시의 측정

노영배(Young Bae Roh),김철민(Cheol Min Kim),엄부섭(Boo Sup Oum),이종수(Jong Soo Lee)

Abstract

The purpose of this study is to determine if distance stereoacuity could be used as an objective means of assessing control in intermittent exotropia. We evaluated distance stereoacuity in 37 patients with intermittent exotropia showing orthophoria postopratively using the Mentor B-VAT II Videoacuity tester. All patients had fusion at near but 14 of 31 patients(38%) had fusion at distance preoperatively. The mean preoperative distance stereoacuities were 216 seconds with binocular vision circle(BVC) and 351 seconds with binocular vision random dot E(BVRDE) ( p=0.0002). The postoperative improvement was statistically significant with BVC(p=0.001), not statistically significant with BVRDE(p=0.7). On our results it seems to be easier to know BVC than BVRDE in children. It suggests that the BVC is a useful test for assessing control in intermittent exotropia.

Key Words: Distance stereoacutiy;Intermittent exotropia