| Consecutive Cyclic Esotropia Following Surgery for Intermittent Exotropia. |
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Gyoo Sup Kim, Yoonae Cho |
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Department of Ophthalmology, School of Mediuine, Korea University, Seoul Korea. |
| 간헐성 외사시 교정술후 발생한 속발성 주기성 내사시 1 예 |
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김규섭(Gyoo Sup Kim),조윤애(Yoon Ae Cho) |
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| Abstract |
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Cyclic esotropia is a rare condition, first mentioned by Burian in 1958, in which orthophoria is regularly followed by constant deviation on rhythmic pattern. The periodicity would suggest a biologial clock mechanism. Consecutive cyclic esotropia following strabismus surgery is extremely rare. Only three cases of consecutive cyclic esotropia following surgery for intermittent exotropia have been reported We report one case of consecutive cyclic esotropia in an 8-year-old girl who underwent surgery for intermittent exotropia. The periodic esodeviation was treated with bimedial rectus recession. We suggest the overcorrection after surgery for intermittent exotropia would cause the periodicity by biological clock mechanism when the biorhythm of the patient is in an unstable and dangerous state. |
| Key Words:
Biologial clock mechanism;Biorhythm;Consecutive cyclic esotropia;Intermittent exotropia;Surgery |
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