Human Phenotype Ontology 
Grandparent Node:
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Abnormality of eye movement (HP:0000496)help
Parent Node:
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Abnormal conjugate eye movement (HP:0000549)help
..Starting node
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Strabismus (HP:0000486)help
Term ID: 486
Name: Strabismus
Synonym: Cross-eyed; Squint; Squint eyes
Definition: 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.
Comments:
Reference: HP:0000486
Genes and Diseases:
 
       Child Nodes:
........expandCongenital strabismus (HP:0000487) help
................... HP:0008033 Congenital exotropia
........expandUnilateral strabismus (HP:0010877) help
........expandEsodeviation (HP:0020045) help
................... HP:0000565 Esotropia
................... HP:0025312 Esophoria
........expandExodeviation (HP:0020049) help
................... HP:0000577 Exotropia
................... HP:0025313 Exophoria
........expandIncomitant strabismus (HP:0025068) help
................... HP:0009921 Duane anomaly
................... HP:0020041 Double elevator palsy
................... HP:0020042 Double depressor palsy
................... HP:0020043 Vertically incomitant strabismus
................... HP:0020044 Horizontally incomitant strabismus
................... HP:0031622 Brown anomaly
........expandConcomitant strabismus (HP:0025069) help
........expandHyperdeviation (HP:0025587) help
................... HP:0025585 Hyperphoria
................... HP:0025586 Hypertropia
........expandHypodeviation (HP:0025588) help
................... HP:0025584 Hypotropia
................... HP:0031725 Hypophoria
........expandCyclodeviation (HP:0025589) help
................... HP:0031776 Cyclotropia
................... HP:0031777 Cyclophoria
........expandMicrotropia (HP:0031724) help
................... HP:0031781 Microtropia with identity
................... HP:0031782 Microtropia without identity
........expandNeurogenic strabismus (HP:0031775) help

 Sister Nodes: 
..expandImpaired convergence (HP:0000619) help
..expandSupranuclear gaze palsy (HP:0000605) help