Short-sighted (6)
I believe the answer is:
myopic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">short-sighted</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for myopic that I've seen before include "lack of foresight" , "needing help from lens" , "Condition of short-sightedness" , "Nearsighted" , "Imprudent" .)