Human Phenotype Ontology 
Grandparent Node:
Abnormality iris morphology (HP:0000525)help
Parent Node:
Abnormal pupil morphology (HP:0000615)help
..Starting node
Microcoria (HP:0025492)help
Term ID: 25492
Name: Microcoria
Definition: A small pupil (typically diameter less than 2 mm) that dilates poorly or not at all in response to topically administered mydriatic drugs.
Reference: HP:0025492
Genes and Diseases:
       Child Nodes:

 Sister Nodes: 
..expandAbnormal pupil shape (HP:0025309) help
..expandAnisocoria (HP:0009916) help
..expandEctopia pupillae (HP:0009918) help
..expandLeukocoria (HP:0000555) help
..expandPersistent pupillary membrane (HP:0009917) help
..expandPolycoria (HP:0011500) help
InputHPO IDHPO termDistanceGeneGene id entrezDiseaseIdDiseaseNameDiseaseMIMConceptIDSourceTypical associationHGMD variantsClinVar variantsHGNC IDGeneMIM
HPO disease - gene - phenotype typical associations:
HP:0025492HP:0025492Microcoria0LAMB2 CL E G H3913609049Pierson syndrome609049C1836876OMIM11273686487150325
HPO disease - gene - phenotype less frequent non-typical associations:
HP:0025492HP:0025492Microcoria0RBP4 CL E G H5950616428Microphthalmia, isolated, with coloboma 10616428C4225330OMIM08479922180250

Genes (2) :LAMB2 RBP4

Diseases (2) :609049 616428

Human Phenotype Ontology(HPO) is developed by the Human Phenotype Ontology Consortium. The version used here is June 2019 release.