#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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