When you first hear about cataract lens implants most people think of the traditional monofocal lens implant. These implants work very well for correcting vision at one distance. If you are hoping to see at multiple distances an advanced technology or premium lens implant would most likely be a better option. You will need to discuss this in more detail with the South Dakota cataract surgery experts at Vance Thompson Vision.
Monofocal lens implants have been around since the origin of modern day cataract surgery and the creation of phacoemulsification. This process was originally developed by Dr. Charles Kelman when he realized that ultrasonic vibrations could be used to emulsify the lens of the eye and extract it through a very small incision. Upon the improvement of cataract surgery, the original lenses used to replace the natural crystalline lens were monofocal in nature.
For the first 30 years of cataract surgery monofocal lens implants were the only option for insertion during cataract surgery. Monofocal lens implants provide excellent vision at one distance only. Many cataract patients would have these lens implants in order to see well at a distance but would still require reading glasses after surgery. A monofocal lens implant does not correct intermediate or arms length vision for doing things like reading the newspaper and seeing the golf ball on the tee, or even seeing computer screens clearly. Nor do monofocal lens implants correct near vision for doing things up close such as seeing medicine bottles, reading or keeping your golf score, as these tasks require the correction of presbyopia. Thus patients electing to have monofocal lens implants will be dependent on glasses either some or most of the time in about 70% of cases.
Monofocal lens implants work when light enters the actual lens and it is bent to a specific focal point. As the power of the monofocal lens becomes stronger, its ability to bend light more sharply is increased. Because the lens is monofocal, the light can only be bent to one focus point at a time. The light from these lenses is bent to focus specifically on the retina of the eye.
New lens implants are now available that can correct vision at near, intermediate and far distances. These types of lenses are commonly called “lifestyle lens implants” or premium lens implants and fall into the categories listed below. Multifocal, toric, and accommodating lens implants are all considered premium lens implants.
The implantation procedure is the same for both types of IOLs. The main point of differentiation between the IOLs is in the type of vision they provide.
*For more information regarding premium lens implants please visit our web pages for this topic or contact us directly for a cataract surgery consultation.