ICL
In the past three decades, LASIK laser eye surgery has grown to become the most popular refractive surgery and most popular elective surgery worldwide, with more than 10,000,000 procedures performed. LASIK can improve visual acuity, the acuteness or sharpness of vision, with nearly all patients enjoying at least 20/40 acuity after surgery and many enjoying 20/20 vision or better.
However, don't take LASIK for granted and think that it's always successful. LASIK and its relatives (PRK, LASEK, Epi-LASIK) are safe, fast and easy ONLY IF you are a suitable candidate for them and ONLY IF you put your eyes in the hands of a competent, well-trained refractive surgeon with the right technology.
If you are nearsighted (myopic), implantable contact lenses (ICLs) may make it possible for you to get better visual acuity AND quality. This procedure could help you avoid the risk of getting poor results from traditional LASIK surgery and potentially ruin your vision forever.
Vision Acuity
First, what does visual acuity mean? If your visual acuity is 20/20, you are able to see at a distance of 20 feet what the average person with normal vision sees at 20 feet. If your acuity is 20/40, you are able to see at 20 feet what someone with 20/20 vision can see at a distance of 40 feet. And, if you're really lucky and have something like 20/15 acuity, you are able to see at 20 feet what other people must move closer (to 15 feet) to see.
In general, people with visual acuity problems are nearsighted, farsighted, and/or have astigmatism. The goal of LASIK and other laser vision correction procedures is to correct these acuity problems so that you don't have to rely on glasses or contact lenses. However, there is more to good vision than 20/20 acuity. It is possible to have great visual acuity but poor visual quality. The reverse is also true.
Vision Quality
Visual quality refers to vision problems that are most common in low-light situations or at night, such as diplopia (double vision), glare, halos, blurriness, starburst patterns, ghosts or loss of contrast sensitivity. The ability of the eye to distinguish contrast (tell the difference between different shades of white and grey) is a very important factor because many of the things we do routinely, such as recognize people's faces, rely on our sensitivity to contrast. These problems are called higher-order aberrations and they cannot be corrected by traditional LASIK procedures.
These quality problems are also very common risks and complications of LASIK surgery. Many patients who undergo LASIK surgery in the hands of under-qualified LASIK surgeons are left with serious declines in the quality of their vision because they had higher-order aberrations that were not properly diagnosed. Just when they thought their vision would improve after LASIK, the opposite occurred.
What's an Implantable Contact Lens?
Implantable contact lenses, also known as phakic intraocular lenses, are an alternative to traditional LASIK surgery for nearsighted patients and, in many cases, may provide them with better vision than LASIK ever would. Phakic refers to an eye which still has its natural lens, compared with cataract surgery where the natural lens is removed and replaced. One of the best parts about implantable contact lenses is that they are permanent and work just like conventional contact lenses without the hassle.