Monovision treatment is a method of correcting near vision focus for people over 40 who are affected by Presbyopia. Presbyopia causes the eye's natural crystalline lens to lose its ability to bring near objects into clear focus. Monovision treatment corrects distance and near vision by correcting one eye for distance and the other eye for near vision. Contact lenses, Intraocular lenses and laser refractive surgery are suitable for monovision. With both eyes open, the brain is able to automatically switch focus from distance to near. Most people adapt quickly. However, for some it can take longer to adapt - your practitioner will test for your suitability. Monovision correction can provide many years of freedom from reading glasses.