Types of Intraocular Lens Implants (IOLs)

Typically during cataract surgery, an artificial lens implant (IOL) is inserted into the eye to restore clear useful vision.

Measurements of the eye are done preoperatively in the office to determine the power of the IOL.

With the variety of lenses currently available, patients can experience refractive cataract surgery and target for a desired refractive outcome.

Monofocal IOL

A Monofocal IOL is designed to give the clearest vision at one place: either distance, near, or intermediate. Usually the patient would at least need glasses for the other visual tasks, such as wearing reading glasses or computer glasses if the implant corrects the distance vision.

If there is a significant amount of astigmatism in the patients eyes, they will need glasses for best correction of their vision in all aspects of their vision. Some patients request monovision. However, monovision is not recommended in patients who have never tried it. The change in depth perception is difficult to get used to if the patient is not aware of what it will be like.

Some people may notice a mild decrease in depth perception with the Monovision option since there is not one distance where both eyes are in equal focus, but eyeglasses may be used as desired to provide good focus in each eye at all distances.

Also, the alternative variation Mini-monovison (also known as blended vison) can be targeted where there is only a small difference between the eyes. This helps with mid-range and larger print, but low power reading eyeglasses would still be needed for smaller print and prolonged reading.

Multifocal IOL

A Multifocal IOL can give clear vision over a variety of ranges from near to distance. Many patients will not need glasses, or will be much less dependent on glasses, when Multifocal IOLs are utilized. For the best results, usually a Multifocal IOL must be placed in each eye. Not all patients are good candidates for such an IOL however, and during the exam your eye doctor can determine suitability of the Multifocal IOLs. Also, there are some relative visual limitations to these lenses in certain lighting conditions.

Toric IOLs

Toric IOLs are specialized IOLs that are made to correct astigmatism. This lens implant can reduce or eliminate visual aberrations that astigmatism causes and so may result in clearer postoperative vision in patients with pre-existing corneal astigmatism.

Another, somewhat less predictable, method of correcting astigmatism, Corneal or Limbal Relaxing Incisions (or Astigmatic Keratotomy), can also be utilized to reduce or eliminate astigmatism at the time of cataract surgery. Cataract Surgery can also correct astigmatism. These procedures also are not covered by insurance benefits. Our ophthalmologists can help you to decide what would be the best procedure for you.

Advanced Presbyopia Correcting IOLs

There are advanced presbyopia-correcting intraocular lenses (IOLs) designed to provide a continuous range of vision, helping patients see clearly at distance and intermediate ranges, with functional near vision. Their innovative optical design aims to deliver smooth visual transitions while minimizing visual disturbances such as halos and glare.