Whether you have a dysfunctional lens, or an opaque cataract, there are opportunities to restore near, intermediate and distance vision with special advanced technology intraocular lenses. There are four categories of intraocular lenses. Our goal is to provide visual freedom for most daily activities, understanding that in certain situations, glasses may still be beneficial.
|Lens Type||Monofocal (0-5)||Accommodative (0-5)||EDOF (0-5)||Multifocal (0-5)|
|Significant Glare / Halo||Low incidence (1)||Low Incidence (1)||Low to medium (2)||Medium to high (3)|
|Quality of Vision||+++++ (5)||+++++ (5)||++++ (4-5)||+++ (3)|
|Near vision||– (0)||+/- (1-2)||+++ (3-4)||++++ (4-5)|
|Intermediate vision||+ (1)||++ (2)||++++ (4-5)||+++ (2-3)|
|Distance vision||+++++ (5)||++++ (4-5)||+++++ (4-5)||++++ (4)|
|Likelihood of Enhancement||Low||Medium||Medium||Medium|
The Softec 1 and Softec HD are both examples of monofocal intraocular lenses. This type of lens can provide excellent vision at one point of focus (typically distance vision). There is a low incidence of glare and halos with these lenses. Unfortunately, it does not provide simultaneous near and distance vision. However, it can be used for monovision or blended vision to achieve a more full range of vision. Typically, most patients opt for glasses after surgery for a full range of vision.
The Crystalens is an example of an accommodating IOL. It typically provides good distance and some intermediate vision. Unfortunately, our experience has shown that it is not a reliable choice to correct near vision in all patients. This lens is built on a hinge, which can make the result somewhat unpredictable in the beginning, requiring secondary laser refractive surgery afterwards, and some loss of effect over time.
EDOF: Extended Depth of Focus
The Symfony and Symfony Toric (for patients with astigmatism) is an example of an extended depth of focus intraocular lens. In our experience, it has provided the best overall range of vision with the fewest unwanted side effects. It is engineered to provide excellent distance vision, with a limited incidence of bothersome glare and halos. Most patients will see some halos, glare or spider web light effects at night, especially in the first few months after surgery. These disturbances are typically mild, and get better over time as the brain gets used to the way the lens provides the vision. These lenses help patients achieve excellent intermediate and some near vision as well without loss of distance vision. Also, because of the way the light is focused, it is less common to require a secondary laser refractive surgery after cataract surgery for fine-tuning.
The Tecnis Multifocal and Alcon ReStor lenses are examples of multifocal intraocular lenses. This technology has been around for over a decade, and the results are well established. Patients typically achieve good vision at two points, typically distance and near. Unfortunately, glare and halos are more common in these lenses compared with monofocal, accommodating or EDOF lenses. Some loss of overall clarity can be experienced with this type of lens in certain patients. Also, patients with astigmatism may not qualify for this lens. These lenses are less forgiving than monofocal or EDOF lenses, and therefore more commonly require secondary laser refractive surgery after cataract surgery for fine-tuning.