Until recently, the primary option for cataract surgery was to receive a “fixed focus” intraocular lens implant (IOL). This would correct both eyes for distance, but would not correct significant amounts of astigmatism or provide clear near vision. Patients who receive this type of IOL will still require glasses for intermediate and near vision after surgery
If you are experiencing difficulty seeing up close without the use of reading glasses, you may be a candidate for one of the new technologically advanced IOLs that can provide a full range of vision. This means that you could see clearly at distance and near and everything in between, with little or no dependence on bifocals or reading glasses. It’s almost like having bifocals or progressive lenses inside your eye.
Choosing which implant is right for you depends on the unique characteristics of your eye, as well as your lifestyle needs. Dr. Marc Sanders and Dr. Andrew Salem and their team at Diagnostic Eye Center will discuss your Houston cataract surgery options with you and help you determine which lens is best suited for your eyes.
Extended Depth of Focus IOLs
The first in a new category of IOLs called Extended Depth of Focus (EDOF) IOLs, the TECNIS® Symfony lenses are the only lenses in the United States that provide a full range of continuous high-quality vision from distance to arm’s length, and sometimes closer. This exciting new lens technology, FDA approved in July 2016, also includes a version of the lens for people with astigmatism, the Tecnis Symfony Toric IOL. The goal of the Tecnis Symfony lens is for patients to have good distance and intermediate/computer vision with less dependence upon glasses. Some patients may still need readers for small print.
The Symfony lens is approved in more than 50 countries around the world and has been widely studied, with data from numerous clinical studies involving over 2,000 eyes. In clinical studies, patients who received the Symfony lens could see objects sharply and clearly at near, intermediate and far away distances, and points in between. There was a low incidence of halo and glare, which may be perceived as rings or blurring around bright lights. Glare and halos can sometimes affect an individual’s ability to drive at night or to perform other visual tasks.
Multifocal lens implants are lenses that provide multiple focal points by use of an optical process called diffraction. They are designed to correct presbyopia (near vision loss that occurs with age) in order to provide clear vision at distance, intermediate, and near. Part-time glasses may still be needed after implantation of this type of lens. This type of implant does not correct astigmatism and can create visual effects at night from lights. Generally, patients are not severely bothered by these phenomena.
The Acrysof® IQ ReSTOR® IOL and the TECNIS® Multifocal IOL are two brands of lenses that utilize this technology.
Accommodating lens implants contain a hinge-type design and are intended to provide clear vision at distance and near. They are designed to allow the optic, or the central circular part of the lens that you see through, to move back and forth as you change focus on images around you, just like your natural lens. Part-time glasses may still be needed after implantation of this type of lens.
Crystalens® and TRULIGN™ are currently the only FDA approved IOLs that utilize this technology. TRULIGN™ is currently the only toric accommodating IOL, meaning it can correct astigmatism while providing clear vision at distance and near.
Toric lens implants are astigmatism-correcting monofocal intraocular lenses. This type of lens is designed to correct significant amounts of astigmatism. The goal is to create clear, focused vision at a predetermined location, either distance or near. Most patients opt for sharp distance vision. Reading glasses may still be necessary after implantation of this type of lens. This type of implant is not intended to provide clear distance and near vision simultaneously.
The Acrysof® IQ Toric IOL and the TECNIS® Toric Aspheric IOL are two brands of lenses that utilize this technology.