Ophthalmology in China

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A study on the correction of acute concomitant esotropia by prism

ZHAO Shi-qiang1, 2 , LIU Yang1, SUN A-li2, WANG Xiao- bing2,   LI Lei2,WANG Bing2   

  1. 1. Beijing Chest Hospital, Capital Medical University,  Beijing 101149,  China; 2.Beijing Tongren Eye Center,  Beijing Key Laboratory of Ophthalmology and Visual Sciences,  Beijing Tongren Hospital,  Capital Medical University,  Beijing 100730,  China
  • Received:2017-07-31 Online:2018-03-25 Published:2018-03-24
  • Contact: LIU Yang, Email:LYGYL1973@126.com


Objective To investigate the treatment prescription for patients with diplopia caused by acute concomitant esotropia. Design Retrospective case series. Participants Fourty-two patients with diplopia caused by acute concomitant esotropia were treated with prism. Methods Patients with acute esotropia caused by diplopia were examined with Maddox Rod,  Synoptophore,  Von Graefe prism separated by strabismus examination,  and convergence measurement. The main intention of these tests was to determine a prescription volume to achieve maximum elimination of diplopia with no discomfort. The correlation between the results retrieved from each apparatus and the amount of prescribed was analyzed. Main Outcome Measures Degree of diplopia. Results The strabismus examination showed that the Maddox Rod was (20.57±9.53) △. The results of Synoptophore indicated (16.01±8.30)△. The Von Graefe prism was(15.95±7.07)△. The fracture point was (5.17±4.20)△. Measurement by prism and cover was (13.24±5.01)△,   and the regression point was (9.14±5.76)△. Prism prescription amount was (6.92±3.49)△. The correlation coefficients of among Von Graefe prism separation,  measurement by prism and cover,  fracture point,  regression point and prism prescription amount were 0.496,  0.546,  0.647,  0.408,  0.831 and 0.708,  respectively. Conclusion The fracture point has the maximum correlation to the prescribed prism amount. It can serve as the foundation for the prism correction.(Ophthalmol CHN,  2018, 27:146-149)

Key words: acute concomitant esotropia, diplopia, esotropia deviation, prism