microtropia

Monofixation syndrome, alsos known as microtropia, is a small angle strabismus, typically an esotropia, measuring less than 5-8 prism diopters. It is often difficult to detect on cover testing due to the subtle deviation. A central suppression scotoma is usually present in the deviating eye. Microtropia can occur as a primary condition or secondary to treatment of a larger angle strabismus.