Human Phenotype Ontology 
Grandparent Node:
Abnormality of ocular smooth pursuit (HP:0000617)help
Parent Node:
Impaired smooth pursuit (HP:0007772)help
..Starting node
Absent smooth pursuit (HP:0007179)help
Term ID: 7179
Name: Absent smooth pursuit
Definition: A complete lack of the ability to track objects with the ocular smooth pursuit system, a class of rather slow eye movements that minimizes retinal target motion.
Reference: HP:0007179
Genes and Diseases:
       Child Nodes:

 Sister Nodes: 
..expandImpaired horizontal smooth pursuit (HP:0001151) help

Genes (4) :DPM2 FGF14 RARS1 TBCD

Diseases (5) :ORPHA:329178 OMIM:193003 ORPHA:438114 ORPHA:496641 OMIM:617193

Human Phenotype Ontology(HPO) is developed by the Human Phenotype Ontology Consortium. The version used here is December 15 2022 release.