Human Phenotype Ontology 
Grandparent Node:
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Abnormal fundus morphology (HP:0001098)help
Parent Node:
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Abnormality of the optic nerve (HP:0000587)help
..Starting node
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Marcus Gunn pupil (HP:0200057)help
Term ID: 200057
Name: Marcus Gunn pupil
Synonym: Relative afferent pupil defect; Relative afferent pupillary defect
Definition: An aberrant pupillary response characterized by (i) Constriction of pupils of both eyes when the light stimulus is applied to the normal eye, and (ii) Dilatation of pupils of both eyes when the light stimulus is rapidly transferred from the normal eye (after brief light exposure to the normal eye) to the affected eye.
Comments:
Reference: HP:0200057
Genes and Diseases: SELECT DISTINCT 'HP:0200057' AS Input, t2.acc as HPO_ID, t2.name as HPO_term, g.Distance, t1.Entrez_gene AS Gene, t1.Entrez_gene_id AS Gene_id_entrez, t1.HGNC_ID, t1.DiseaseId, t1.DiseaseName, t1.Frequency, t1.Onset #, t1.ConceptID, Source, t1.Typical_association , h.Variants AS HGMD_variants, c.variants AS ClinVar_variants FROM hpo202212.graph_path AS g, hpo202212.term AS t, hpo202212.term AS t2 LEFT JOIN hpo202212.hpo_phenotype_to_genes as t1 ON (t1.HPO = t2.acc) LEFT JOIN gb_exome.clinvar_variation_latest_sum AS c ON ( c.Gene = t1.Entrez_Gene) LEFT JOIN gb_exome.hgmd_allmumt_sum_latest AS h ON (h.gene = t1.Entrez_Gene ) WHERE (t.acc ='HP:0200057' AND g.term1_id = t.id AND g.distance <=20 AND t2.id = g.term2_id) order by g.distance, gene, DiseaseName;