Phakic IOLs (Implantable Lenses)
In cases where the cornea is too thin, has an unusual shape or the refraction error is too large to be corrected with laser surgery, the solution may be the implantation of an additional lens into the eye. Additional lenses are either fixed to the iris or placed behind the iris.
Unlike laser surgeries of the eye, the additional lens can be removed from the eye, which means that the optical condition of the eye can be restored to the level it was prior to surgery. The safety and efficiency of the procedure are proven by the fact that Artisan/Verisys additional lenses have been implanted in eyes throughout the world over 150,000 times since 1991. The foldable Artiflex additional lens, which requires a smaller incision, has been used since 2003. See more information.
The Artisan additional lens allows for adjustment of myopia in the range of -1 to -23.5 dioptres, long-sightedness in the range of +1 to +12 dioptres and astigmatism (cylinder) up to 7 dioptres. The Artiflex foldable lens can be used to adjust short-sightedness within the range of -2 to - 14.5 dioptres. The additional lens is visible only under a microscope or by looking very closely. For optimal mobility in the intraocular fluid before the implantation of the additional lens, the ophthalmologist makes small so-called security holes in the iris with a YAG laser.
Lately, more ICL lenses are being used. These lenses are implanted behind the iris in a manner similar to how a contact lens is placed on the surface of the eye. The advantages of STAAR ICL lenses over the iris-attached additional lenses (Artisan, Artiflex) are:
- Significantly easier procedure for both the patient and surgeon
- Generally performed under drop anaesthesia like laser surgeries
- No need to make the so-called security holes in the iris with a laser
- Typically, both eyes undergo operation on the same day
An animation of the ICL additional lens procedure can be viewed here.