One option to correct near and far vision is monovision. This system can be accomplished with farsighted, nearsighted or astigmatism corrections. It can be a light compromise to both distances, but can give the patient very “functional” vision, without needing additional reading glasses. This method involves fitting the patient’s dominant eye with a distance-vision contact lens and the non-dominant eye with a contact lens corrected for near vision. The brain receives images from both distances at the same time. The brain then selects the image upon which it wants to focus. When both eyes are open the patient is often unaware which eye is providing the clear vision.
Monovision may be less effective in dim or dark lighting. Monovision is not recommended for patients whose jobs have to do with transportation or the operation of heavy equipment (such as pilots, truck drivers or bus drivers).