Two Cases of Cyclic Esotropia

ABSTRACT

Cyclic heterotropia represents an interesting ocular motility problem in which the ocular deviation is present on a rhythmic basis. Usually this appears in a regular 48-hour cycle, although 72-and 96-hour cycles have also been reported. On the strabismic day, constant heterotropia is large and associated with suppression and no diplopia. On the nonstrabismic day, no deviation or only a small heterophoria is present with good binocular function. In this paper, we present two cases of cyclic esotropia which demonstrated regular 48-hour cycles and were treated with surgery.