Esotropia is a condition in which one eye is turned in or nasally. These in turning may be alternate or constant. Congenital or essential infantile esotropia syndrome is a common type of strabismus. It is mostly present in the first 6 to 12 month of age. Association may be with cross fixation, other extraocular muscle overaction, amblyopia, large deviation mostly with no refractive error and with or without nystagmus. It should be differentiated from other causes of esotropia. Management include mostly surgical. Here we report a case of 10-year-old male child with left eye congenital esotropia (40 PD BO) with no oblique overaction, no amblyopia with normal fundus. The case was managed by left eye medial rectus recession and lateral rectus resection. So, in conclusion we report uniocular surgery has same result as binocular surgery. However, surgery done in an early age has a good outcome as compared to delayed surgery.

Keywords : Amblyopia, Base Out (BO), Cross Fixation, Esotropia, Prism Diopter (PD), Overaction