THESAURUS
unobserving
ableptical, amaurotic, benighted, bereft of light, blind, careless, color-blind, dark, dim-sighted, disregardant, disregardful, distracted, distrait, eyeless, heedless, hemeralopic, in darkness, inadvertent, inattentive, incurious, indifferent, inobservant, mind-blind, negligent, nyctalopic, rayless, regardless, sightless, spiritually blind, stark blind, stone-blind, thoughtless, undiscerning, unenlightened, unheedful, unheeding, unmarking, unmindful, unnoticing, unnoting, unobservant, unperceiving, unreachable, unremarking, unseeing, unwatchful, visionless
