Why Eye Doctors Assign One Eye for Close Up and One Eye for Distance
Monovision as an Option for Presbyopia
As you age, your eyesight begins to decline, usually around your early 40’s. Things like reading and computer work either strain your eyes, or are impossible without reading glasses. A condition called presbyopia causes your near vision to become blurred, and is the result of the effects of age on the lens of your eye, making it less flexible and causing difficulty in focusing on close objects. Several different options are available to help correct this problem, the most common being bifocal glasses. If you don’t want to wear glasses, other options include multifocal contact lenses as well as laser surgery. Another choice for those with presbyopia is a contact lens option called monovision. Your doctor prescribes a single lens for near vision and another, if needed, for far vision.
How Monovision Contact Lenses Work
Usually your dominant eye will use the contact lens for distant vision, while the non-dominant eye will wear the lens for near vision. The eye with good distance vision will see poorly up close, and the eye with clear near vision will see poorly at a distance; but it all evens out. Your brain makes up the difference by taking the information from both eyes to create clear vision at all distances. It can take a few weeks to adapt to this new way of seeing, but most people adjust fairly well. There is also a cost savings associated with this choice, as normal contact lenses are usually less expensive than multifocal lenses.
About 70 to 80 percent of patients will find satisfaction with monovision, the biggest factor being the skill of the doctor and the fitting techniques he or she uses to determine the correct powers for the two differing contact lenses. Many people are extremely satisfied once they find the correct lens strength. The most prevalent reasons for failure of the monovision approach to presbyopia correction is the fitting process going awry. Make sure you find a doctor who will support you throughout the fitting process to ensure your success.