Monovision
One way to correct presbyopia with contact lenses is through the use of a process called monovision. In monovision, one eye is used for distance vision, while the other is used for near vision. Patients with monovision learn to use only one eye at a time, depending upon the visual task. Most patients prefer to use their dominant eye for distance, and their nondominant eye for reading. Monovision is a practical solution for many presbyopic patients who want to reduce or eliminate the need for eyeglasses. This method does, however, cause a reduction of depth perception and a slight loss of clarity of vision. Monovision is not recommended for driving at night due to significant increase in glare and reduction of depth perception. Patients may elect to wear a special pair of driving eyeglasses over their monovision contact lenses to allow for safe night driving.