has part has part characteristic of inheres in has modifier Strabismus HP:0000486 SNOMEDCT_US:128602000 Cross-eyed Squint HP:0000487 UMLS:C0038379 Squint eyes SNOMEDCT_US:22066006 A misalignment of the eyes so that the visual axes deviate from bifoveal fixation. The classification of strabismus may be based on a number of features including the relative position of the eyes, whether the deviation is latent or manifest, intermittent or constant, concomitant or otherwise and according to the age of onset and the relevance of any associated refractive error. Abnormal conjugate eye movement abnormal misaligned with anatomical line between pupils