Monovision gives reference to the use of one eye for near vision and the other for distance vision. This procedure has great success for patients with presbyopia. The surgeon typically chooses the dominant eye as the distance eye and the non-dominant eye as the near vision eye. The surgeon will then give a trial of contact lenses to simulate what what the vision would be like. If the trial is successful, then the LASIK surgeon will perform laser surgery, correcting the stronger (dominant) eye for distance and the weaker eye (non-dominant) for near vision. Patients who already have mild to moderate myopia (nearsightedness) usually do well, sometimes not even needing a contact lenses trial.
Monovision uses a process in the brain called neuro-adaptation. The brain has to get used to the fact that one eye is designed for near and the other for far, perceiving two simultaneous images and tries to blend them together. It could take upto 3-4 months for this process to occur, ty