Sensory Testing for Binocular Suppression in Accommodative Esotropes

ABSTRACT

It is important to detect binocular suppression of pediatric strabismic patients, especially in accommodative esotropes and intermittent exotropes. However, it may take a long time and false results may be obtained in young children. In order to examine binocular suppression, we selected 103 accommodative esotropes with binocular suppression. Vectograph test, Worth 4 dot test, and 4 prism base-out test were performed at distance, and Worth 4 dot test, TNO test, and Bagolini test at near. Titmus fly test and Randot stereotest were administerd to know the relationship between stereoacuity and suppression. In detecting binocular suppression, the true rate of vectogram was 95%, which was the highest result of all tests and 4 prism base-out test was the next with 88% of the true rate. The stereoacuity was increased in proportional to the absence of suppression. The vectographic porject test was the easiest and the most accurate test to identify normal fusion or binocular suppression at distance in young strabismic children. The accuracy will be increased in the combination with 4 prism base-out test. Therefore the vectograph also can be used in the screening of small amount of deviation, monocular amblyopia and low vision in kindergarten and elementary school.