Some nearsighted patients that are presbyopic, or nearing the age for presbyopia, may elect to have one eye set for a distance correction and the other eye set for a near correction. This is done by under correcting the near or reading eye. Near vision allows you to read intermediate size print, such as with items in a grocery store or on a menu, but may not be adequate for fine print such as The Wall Street Journal.

Since only one eye is set for distance, the stereo vision and depth perception may be diminished, as is the overall quality of distance vision.

Thorough preoperative screening and trial of mono vision as simulated with contact lenses may identify patients at risk for a suboptimal outcome with mono vision.