Mirage is a synonym of vision. As nouns the difference between mirage and vision is that mirage is an optical phenomenon in which light is refracted through a layer of hot air close to the ground, giving the appearance of there being refuge in the distance while vision is (uncountable) the sense or ability of sight. As verbs the difference between mirage and vision is that mirage is to cause to appear as or like a mirage while vision is to imagine something as if it were to be true.