@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_inability_	skos:broader	isac:visual_problem_ .
isac:_astigmatism_	skos:broader	isac:visual_problem_ .
isac:_cataract_	skos:broader	isac:visual_problem_ .
isac:_light_	skos:broader	isac:visual_problem_ .
isac:_pattern_	skos:broader	isac:visual_problem_ .
isac:_problem_	skos:broader	isac:visual_problem_ .
isac:_vision_	skos:broader	isac:visual_problem_ .
isac:_line_	skos:broader	isac:visual_problem_ .
isac:_squint_	skos:broader	isac:visual_problem_ .
isac:_blindness_	skos:broader	isac:visual_problem_ .
<http://webisa.webdatacommons.org/concept/_loss_of+vision>	skos:broader	isac:visual_problem_ .
isac:_dyslexia_	skos:broader	isac:visual_problem_ .
isac:_floater_	skos:broader	isac:visual_problem_ .
isac:_eyelid_	skos:broader	isac:visual_problem_ .
isac:_myopia_	skos:broader	isac:visual_problem_ .
<http://webisa.webdatacommons.org/concept/visual+field_defect_>	skos:broader	isac:visual_problem_ .
isac:_strabismus_	skos:broader	isac:visual_problem_ .
isac:low_vision_	skos:broader	isac:visual_problem_ .
isac:_diplopium_	skos:broader	isac:visual_problem_ .
isac:_nystagmus_	skos:broader	isac:visual_problem_ .
isac:blurry_vision_	skos:broader	isac:visual_problem_ .
isac:double_vision_	skos:broader	isac:visual_problem_ .
isac:blur_vision_	skos:broader	isac:visual_problem_ .
isac:convergence_insufficiency_	skos:broader	isac:visual_problem_ .