PURE ANTEROPOSITIONING OF INFERIOR OBLIQUE - A SELECTIVE WEAKENING PROCEDURE

Anteropositioning of inferior oblique is of late becoming popular but it inadvertently also entails a compulsory recession which may be unde sirable at times. We have evaluated the effect of a 'pure' anteroposit ioning procedure (11 eyes), with Elliot & Nankin's anteropositioning ( 10 eyes) and Parks' recession (17 eyes). The mean change of vertical d eviation in elevation in adduction (surso adduction) was 15.09 +/- 8.3 prism dioptres (p.d.) in pure anteropositioning; 23.50 +/- 5.6 p.d. i n E & N's anteropositioning and 14.82 +/- 5.9 p.d. in Parks' recession , showing this procedure to be as effective as a conventional recessio n procedure; However, while the latter two methods produced an intorsi on, 'pure' anteropositioning produced no significant change in torsion . It is a much simpler procedure to weaken the elevation without affec ting the torsion.