Evaluation of subjective and objective cyclodeviation following oblique muscle weakening procedures

Pradeep Sharma, Thanikachalam S, Sachin Kedar, Rahul Bhola

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Purpose: To evaluate the subjective and objective cyclodeviational changes following different weakening procedures on superior and inferior oblique muscles Design: Comparative case series Materials and Methods: In a prospective institution based study, 16 cases of A pattern horizontal strabismus having superior oblique overaction were randomized to superior oblique weakening procedures: either silicon expander or translational-recession. Similarly, 20 cases of V pattern horizontal strabismus with inferior oblique overaction were randomized for inferior oblique weakening procedures: either 10 mm Fink′s recession or modified Elliot and Nankin′s anteropositioning. Cyclodeviation was assessed subjectively with the synoptophore and objectively using the fundus photograph before surgery and 3 months postoperatively. Change in cyclodeviation was measured by subjective and objective methods. The index of surgical effect (ISE) was defined as the net torsional change postoperatively. Results: The difference between the extorsional change induced by the two superior oblique procedures, silicone expander (-6°) and translational recession (-11.3°), was statistically significant (P=0.001). Translational recession caused more extorsional change (ISE=296%) than silicone expander surgery (ISE=107%). The two inferior oblique weakening procedures, Fink′s recession (+2.5°) and modified Elliot and Nankin′s anteropositioning (+4.7°) produced equitable amount of intorsional shift with no statistical difference (P=0.93). Objective measurements were significantly more than the subjective measurements. Conclusions: Different weakening procedures on oblique muscles produce different changes in cyclodeviation, which persists even up to 3 months. Subjective cyclodeviation is less than the objective measurements indicating partial compensation by sensorial adaptations.

Original languageEnglish (US)
Pages (from-to)39-43
Number of pages5
JournalIndian journal of ophthalmology
Volume56
Issue number1
DOIs
StatePublished - Mar 1 2008

Keywords

  • Fink's recession
  • Modified Elliot and Nankin
  • Oblique muscle surgery
  • Silicone expander
  • Subjective and objective cyclodeviation
  • Torsion measurement
  • Translational recession

ASJC Scopus subject areas

  • Ophthalmology

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