Monofixation syndrome (MFS) (also: microtropia or microstrabismus) is an eye condition defined by less-than-perfect binocular vision.
Their stereoacuity is often in the range of 3000 to 70 arcseconds, and a small central suppression scotoma of 2 to 5 deg.
[3] A rare condition, MFS is estimated to affect only 1% of the general population.
[4] Secondary MFS is a frequent outcome of surgical treatment of congenital esotropia.
[2] A study of 1981 showed MFS to result in the vast majority of cases if surgical alignment is reached before the age of 24 months and only in a minority of cases if it is reached later.