ableptical, amaurotic, behind the curtain, behind the scenes, benighted, bereft of light, blind, camouflaged, color-blind, concealed, dark, dim-sighted, disguised, eyeless, hemeralopic, hidden, imperceptible, in darkness, indiscernible, insensible, invisible, latent, mind-blind, nyctalopic, out of sight, rayless, secret, spiritually blind, stark blind, stone-blind, submerged, unapparent, unbeheld, unbeholdable, undiscernible, undiscerning, unenlightened, unnoticed, unobserved, unobserving, unperceivable, unperceived, unperceiving, unrealized, unseeable, unseeing, unseen, unviewed, unwitnessed, viewless, visionless