sightful

adjective2

1. •
   Having full sight; clear-sighted; perspicacious and discerning; observant

   • While polling trends can be interesting and even sightful, again, the only meaningful poll is on Election Day — 2008
2. •
   (no longer used) Easily or clearly seen; distinctly visible; perspicuous

   • for sadness and affliction not only diminisheth and consumeth the moisture of the brain, but also drieth up the bones, with which quality the understanding groweth more sharp and sightful. — 1594