%0 Journal Article
%T Evaluation of subjective and objective cyclodeviation following oblique muscle weakening procedures
%A Sharma Pradeep
%A Thanikachalam S
%A Kedar Sachin
%A Bhola Rahul
%J Indian Journal of Ophthalmology
%D 2008
%I Medknow Publications
%X 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¡äs recession or modified Elliot and Nankin¡äs 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¡ã) and translational recession (-11.3¡ã), 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¡äs recession (+2.5¡ã) and modified Elliot and Nankin¡äs anteropositioning (+4.7¡ã) 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.
%K Fink¡äs recession
%K modified Elliot and Nankin
%K oblique muscle surgery
%K silicone expander
%K subjective and objective cyclodeviation
%K torsion measurement
%K translational recession
%U http://www.ijo.in/article.asp?issn=0301-4738;year=2008;volume=56;issue=1;spage=39;epage=43;aulast=Sharma