Types of Refractive Lens Surgery
Refractive Lens Exchange
Once you are over 50, when your lenses have relatively little ability to change focus, refractive lens surgery would usually be done by replacing your own lens with an artificial intraocular lens. Effectively a cataract operation done not to replace a cloudy lens, but to gain the focussing advantages offered by an artificial lens.
This surgery can be combined with the use of a premium lens to give a better range of focus, or to correct astigmatism, or to do both. This operation is referred to as Refractive Lens Exchange.
Refractive Lens Exchange
Phakic Intraocular Lenses
If you are younger and do not want or need to have your own lens replaced, high levels of refractive error can be corrected by implanting a supplementary lens in addition to the human lens inside the eye. This lens is known as a phakic lens or phakic ICL.
This approach is most suitable for people under 50 who are unsuitable for, or who choose not to have laser refractive surgery, particularly for people with high degrees of myopia. short-sightedness or near-sightedness, the inability to see in the distance without glasses or astigmatism, especially if your prescription is too high to be treated safely with laser refractive surgery.
Supplementary Intraocular Lenses
In eyes that have already had cataract surgery, Supplementary Intraocular Lenses can be used to correct:
- Supplementary Intraocular Lenses are also available as a multifocal lens.
Some eyes are left following cataract surgery with significant focus errors both from astigmatism and from myopia or hyperopia. This can now be corrected with a relatively simple procedure to implant a second lens. A new, specially designed lens http://www.rayner.com/products/sulcoflext-supplementary-lenses, from British manufacturer Rayner (who made the very first intraocular lens implanted for Sir Harold Ridley in 1949) allows a second IOL to be implanted in front of the original IOL, without the risks associated with “piggy-backing” a normal IOL in front of the first IOL. This procedure offers a reversible way to correct residual focussing error after cataract surgery, or to gain the advantages of a multifocal lens when that option was not available or offered to you when you originally had surgery.
For patients who have already had surgery to treat cataract, who have been left out of focus with myopia, hyperopia a condition where the eye has to do focussing work to see in the distance and even more focussing work to see near, the opposite of myopia or astigmatism or who wish to have a multifocal implant, to gain better vision for distance and near, I can implant a supplementary lens in addition to the artificial lens implanted at the original surgery, to achieve this.