Short-sightedness or myopia was an eye condition that caused distant objects to appear blurred. The term was also used to describe lack of imagination or foresight.
In 2286, the Federation President told James T. Kirk he and the crew of the HMS Bounty had saved Earth from its own short-sightedness by bringing forward George and Gracie to deal with the Whale Probe. (Star Trek IV: The Voyage Home).
Later that year, Gul Ocett called Nu'Daq short-sighted for considering that he had surrendered his component of an alien computer program for nothing, when it emerged that the program was still incomplete. (TNG: "The Chase")
In 2371, Elim Garak goaded Gul Dukat by claiming that Dukat's short-sightedness had held him back, and that Dukat's father had had the same problem. He later cited Dukat's own counter-insurgency program turning against him as evidence of this short-sightedness. (DS9: "Civil Defense")
In 2375, Kathryn Janeway re-examined her decision to strand the USS Voyager in the Delta Quadrant four years earlier by destroying the Caretaker's array and concluded she had acted short-sightedly. (VOY: "Night")