@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .

<https://concepts.sagepub.com/social-science/concept/visual_acuity>
  skos:prefLabel "visual acuity"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/vision_tests> .

<https://concepts.sagepub.com/social-science/concept/visual_field_tests>
  skos:prefLabel "visual field tests"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/vision_tests> .

<https://concepts.sagepub.com/social-science/concept/ocular_refraction>
  skos:prefLabel "ocular refraction"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/vision_tests> .

<https://concepts.sagepub.com/social-science/concept/vision_tests>
  skos:narrower <https://concepts.sagepub.com/social-science/concept/visual_field_tests>, <https://concepts.sagepub.com/social-science/concept/visual_acuity>, <https://concepts.sagepub.com/social-science/concept/ocular_refraction>, <https://concepts.sagepub.com/social-science/concept/color_perception_tests> ;
  skos:exactMatch <https://id.nlm.nih.gov/mesh/D014787.html> ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/ophthalmological_diagnostic_techniques> ;
  skos:prefLabel "vision tests"@en ;
  a skos:Concept .

<https://concepts.sagepub.com/social-science/concept/ophthalmological_diagnostic_techniques>
  skos:prefLabel "ophthalmological diagnostic techniques"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/vision_tests> .

<https://concepts.sagepub.com/social-science/concept/conceptgroup/concepts>
  a skos:Collection, isothes:ConceptGroup ;
  skos:prefLabel "concepts"@en ;
  skos:member <https://concepts.sagepub.com/social-science/concept/vision_tests> .

<https://concepts.sagepub.com/social-science/concept/color_perception_tests>
  skos:prefLabel "color perception tests"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/vision_tests> .