A COMPARISON OF NEAR STRABISMUS MEASUREMENTS WITH DIFFERENT FIXATION TARGETS

Abstract

It has been reported that there is a significant difference in the size of esodeviations when using letters compared to pictures or lights as a fixation target. In many clinics, small picture stickers are used as a target for preliterate or uncooperative children. In this study, experimental stickers with detailed pictures were compared to the Lang fixation cube and a monochromatic circle to assess their suitability as near fixation targets for the measurement of near deviations. Participants were 3-5 years of age and had an esodeviation. The near angle of deviation was measured using the three targets and compared to determine if treatment would be affected. Significance is based on a difference of 5 prism diopters (PD) as this could potentially change the treatment plan. The results of the study show no clinically significant difference when using the experimental sticker, Lang cube or red circle as the near target.