Strabismus can be constant misalignment (TROPIA), a tendency toward misalignment usually compensated (PHORIA) or part-time misalignment (INTERMITTENT TROPIA).
Strabismus may be COMITANT such that the misalignment is the same magnitude in all directions of gaze (straight ahead, reading, up, down, to the left and right), or strabismus can be INCOMITANT meaning the magnitude of misalignment is greater in one direction or another.
Strabismus can result in ESOTROPIA (eye ingoing, crossed or convergent), EXOTROPIA (divergent, out-going or “wall-eye”), or HYPERTROPIA (one eye higher than the other).
