<prompt> Which of the following is not a feature of the congenital esotropiaOnset before 6 monthsCross fixationInferior oblique overactionSurgery rarely required  <response>: Surgery rarely required Congenital esotropia is the most common form of the esotropia. By definition esotropia that present before 6 month age, are designated as congenital esotropia. Salient features More common is children with neurological disorder Equal gender and racial distribution Cross-Fixation, Nystagmus Rotatory and latent, Amblyopia Inferior oblique overaction, dissociated veical detion DVD, Asymmetrical monocular pursuit. Treat amblyopia pre-operatively Surgery is the mainstay of treatment of strabismus, and is done before 2 years of age. 