The adjustment period for monovision contact lenses usually lasts for a week or two, according to EyeHealthWeb. Monovision contact lenses are a treatment for presbyopia, a common age-related vision condition.
Individuals with presbyopia have trouble focusing on close-up objects, explains EyeHealthWeb. Eye doctors use monovision contact lenses to treat presbyopia, by prescribing one contact lens for distance vision and one lens for near vision. Eye doctors fit the dominant eye for distance vision, and the weaker eye for close-up vision.
Monovision tends to sacrifice clarity and depth perception for convenience and style, states EyeHealthWeb. Although vision is possibly clearer when using reading glasses in conjunction with distance contacts, some patients prefer monovision for aesthetic reasons.