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Received: 2007-12-12

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Journal of Zhejiang University SCIENCE B 2008 Vol.9 No.6 P.470-473


Clinical investigation of surgery for intermittent exotropia

Author(s):  Chong-qing YANG, Ye SHEN, Yang-shun GU, Wei HAN

Affiliation(s):  Department of Ophthalmology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China

Corresponding email(s):   yangchongqing18@sina.com, hanweidr@hotmail.com

Key Words:  Intermittent exotropia (X(T)), Surgery, Binocular vision

Chong-qing YANG, Ye SHEN, Yang-shun GU, Wei HAN. Clinical investigation of surgery for intermittent exotropia[J]. Journal of Zhejiang University Science B, 2008, 9(6): 470-473.

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author="Chong-qing YANG, Ye SHEN, Yang-shun GU, Wei HAN",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Clinical investigation of surgery for intermittent exotropia
%A Chong-qing YANG
%A Yang-shun GU
%A Wei HAN
%J Journal of Zhejiang University SCIENCE B
%V 9
%N 6
%P 470-473
%@ 1673-1581
%D 2008
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B0720007

T1 - Clinical investigation of surgery for intermittent exotropia
A1 - Chong-qing YANG
A1 - Ye SHEN
A1 - Yang-shun GU
A1 - Wei HAN
J0 - Journal of Zhejiang University Science B
VL - 9
IS - 6
SP - 470
EP - 473
%@ 1673-1581
Y1 - 2008
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B0720007

Objective: To investigate the time and postoperative binocular vision of strabismus surgery for children with intermittent exotropia (X(T)). Methods: A retrospective investigation was conducted in 80 child patients with intermittent exotropia. Pre- and postoperative angles of deviation fixating at near (33 cm) and distant targets (6 m) were measured with the prolonged alternate cover testing. The binocular function was assessed with synoptophore. Twenty-one patients took the postoperative synoptophore exercise. Results: (1) A week after surgery, 96.2% of the 80 patients had binocular normotopia, while a year after surgery, 91.3% of the 80 patients had binocular normotopia; (2) Preoperatively, 58 patients had near stereoacuity, while postoperatively, 72 patients achieved near stereoacuity (P<0.05); (3) Preoperatively, 64 patients had Grade I for the synoptophore evaluation and postoperatively, 76 patients achieved Grade I. Meanwhile, 55 patients had Grade II preoperatively and 72 achieved Grade II postoperatively. For Grade III, there were 49 patients preoperatively and 64 patients postoperatively (P<0.05); (4) Patients of 5~8 years old had a significantly better recovery rate of binocular vision than those of 9~18 years old (P<0.05); (5) Patients taking postoperative synoptophore exercise had a better binocular vision than those taking no exercise (P<0.05). Conclusions: (1) Strabismus surgery can help to preserve or restore the binocular vision for intermittent exotropia; (2) Receiving the surgery at young ages may develop better postoperative binocular vision; (3) The postoperative synoptophore exercise can help to restore the binocular vision.

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[1] Abroms, A.D., Mohney, B.G., Rush, D.P., Parks, M.M., Tong, P.Y., 2001. Timely surgery in intermittent and constant exotropia for superior sensory outcome. Am. J. Ophthalmol., 131(1):111-116.

[2] Chia, A., Seenyen, L., Long, Q.B., 2005. A retrospective review of 287 consecutive children in Singapore presenting with intermittent exotropia. J. AAPOS, 9(3):257-263.

[3] Figueira, E.C., Hing, S., 2006. Intermittent exotropia: comparison of treatments. Clin. Exp. Ophthalmol., 34(3):245-251.

[4] Govindan, M., Mohney, B.G., Diehl, N.N., Burke, J.P., 2005. Incidence and types of childhood exotropia: a population-based study. Ophthalmology, 112(1):104-108.

[5] Hutchinson, A.K., 2001. Intermittent exotropia. Ophthalmol. Clin. North Am., 14(3):399-406.

[6] Lou, D.H., Xu, Y.S., Li, Y.M., 2005. Sensory exotropia subsequent to senile cataract. J. Zhejiang Univ. Sci. B, 6(12):1220-1222.

[7] Maruo, T., Kubota, N., Sakaue, T., Usui, C., 2001. Intermittent exotropia surgery in children: long term outcome regarding changes in binocular alignment. A study of 666 cases. Binocul. Vis. Strabismus. Q., 16(4):265-270.

[8] Mohney, B.G., Huffaker, R.K., 2003. Common forms of childhood exotropia. Ophthalmology, 110(11):2093-2096.

[9] Nusz, K.J., Mohney, B.G., Diehl, N.N., 2006. The course of intermittent exotropia in a population-based cohort. Ophthalmology, 113(7):1154-1158.

[10] Rutstein, R.P., Corliss, D.A., 2003. The clinical course of intermittent exotropia. Optom. Vis. Sci., 80(9):644-649.

[11] Simmon, E.P., Marcotty, A., Crowe, S., Traboulsi, E.I., 2002. Surgical Out-comes in Exotropia. Annual Meeting of the Association for Research in Vision and Ophthalmology. Fort Lauderdale, Florida.

[12] Stathacopoulos, R.A., Rosenbaum, A.L., Zanoni, D., 1993. Distance stereoacuity: assessing control in intermittent exotropia. Ophthalmology, 100(3):495-500.

[13] von Noorden, G.K., Campos, E.C., 2002. Exodeviations. In: von Noorden, G.K., Campos, E.C. (Eds.), Binocular Vision and Ocular Motility: Theory and Management of Strabismus, 6th Ed. Mosby, St. Louis, p.356-376.

[14] Yu, C.B., Fan, D.S., Wong, V.W., Wong, C.Y., Lam, D.S., 2002. Changing patterns of strabismus: a decade of experience in Hong Kong. Br. J. Ophthalmol., 86(8):854-856.

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