#visual_sense__sight__vision__visual_modality  the ability to see; the faculty of vision
  supertype:  #sense_modality  #exteroception
  subtype:  #achromatic_vision  vision using the rods
  subtype:  #visual_acuity__acuity__sharp-sightedness__sharpsightednes  sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
     subtype:  #oxyopia  unusually acute vision
  subtype:  #binocular_vision__binocularvision  vision involving the use of both eyes
     subtype:  #stereoscopic_vision__stereoscopy  three-dimensional vision produced by the fusion of two slightly different views of a scene on each retina
  subtype:  #central_vision__centralvision  vision using the fovea and parafovea
  subtype:  #color_vision__colorvision__chromatic_vision__chromaticvision__trichromacy  the normal ability to see colors
  subtype:  #distance_vision  vision for objects that a 20 feet or more from the viewer
  subtype:  #eyesight__seeing__sightedness__sightednes  use of the faculty of vision
  subtype:  #monocular_vision__monocularvision  vision with only one eye
  subtype:  #near_vision  vision for objects 2 feet or closer to the viewer
  subtype:  #night_vision__nightvision__nightsight__scotopic_vision__twilight_vision  the ability to see in reduced illumination (as in moonlight)
  subtype:  #daylight_vision__photopic_vision  normal vision in daylight; vision with sufficient illumination that the cones are active and hue is perceived
     subtype:  #foveal_vision  vision with the fovea
  subtype:  #peripheral_vision  vision using only the periphery of the retina

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