What is the optical mechanism of monovision? How monovision works is explained

Monovision is a type of lens correction for presbyopia. Presbyopia is a common eye condition that affects most people as they age. Symptoms of presbyopia include decreased ability to focus on near objects, eyestrain and headaches. One of the most obvious symptoms of presbyopia occurs when a person tries to read. He or she needs to hold the reading material at arm's length in order to clearly see it. To correct presbyopia, monovision is used. What is the optical mechanism of monovision contact lenses? See below.

How monovision corrects presbyopia

In monovision, one eye is given a distance prescription and the other is given a near vision prescription. Over time, usually within six to eight weeks, the brain learns to favor one eye or the other for different tasks, depending on the vision range needed. Monovision can be achieved with contact lenses, refractive surgery or intraocular lenses.

Problems with monovision

Some people successfully use monovision, while others find adapting a bit more difficult. Problems with adapting may include:

• slightly blurred vision
  
• dizziness
  
• headaches
  
• feeling off-balance

These symptoms can last for a few minutes or off-and-on for a few weeks, depending on how quickly you adapt. For those who don't successfully adapt, other options are available, including refractive surgery or intraocular lenses. Fortunately, nearly two-thirds of patients will adapt to some form of monovision correction.

Do you have questions about presbyopia or monovision? Talk to your eye care professional.

For more information on monovision and treatments, see product menu at right.

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