الفهرس Only 14 pages are availabe for public view
 |  | from | 161 |  |  |
| | | from | 161 | | |
Abstract
The development of phakic IOLs has been one of trial and error
throughout the past century. Despite multiple disappointing
complications and due to the perseverance of admirable surgeons, they
have become a promising alternative for the treatment of high degrees of
myopia and hyperopia available today.
The high myope and hyperope are often poor candidates for
corneal laser vision correcting surgery. On the other hand, with proper
patient selection and counseling, these same patients may do extremely
well with phakic IOLs.
Although the use of phakic IOLs is certainly very exciting for the
correction of high refractive error, the lack of long-term results
continues to remain a concern. The later long-term studies are promising
with regard to stabilization of endothelial cell loss. However, this will
continue to remain a concern simply due to the lack of ability for the
corneal endothelium to regenerate. A more accurate reproducible
method for determining ciliary sulcus size is needed. Refinements in the
techniques should allow continued improvements in safety and efficacy.
The CIBA Vision PRL is proving itself a safe and effective
alternative to laser vision correction. It is especially beneficial for
patients with high spherical refractive errors or those who are not
suitable candidates for keratorefractive procedures. Surgeons familiar
with techniques of cataract extraction and posterior chamber lens
implantation will find most techniques associated with implantation of
this lens familiar. The fact that the lens floats in the posterior chamber
makes it easier to size and will possibly lead to less cases of IOLinduced
lens opacification than other posterior chamber phakic IOLs.
However, this aspect of the lens will hinder the likelihood that a toric
version of this lens will be developed.
The Phakic 6H2 lens has a design that may reduce the
complications that have plagued previous myopic phakic IOLs. Phakic
anterior chamber lens designs have been successively modified, leading
to the development of the Phakic 6H2 design. The results to date are
promising, but further long-term studies are needed to ensure the safety
and efficacy in the moderate to high myopic population.
The use of phakic IOLs in pseudophakic patients may be a safe
and effective alternative in the management of pseudophakic
anisometropia. This technique may offer the advantage of a minimally
invasive and reversible procedure. It may also be useful in introducing
multifocal optics into the pseudophakic eye for correction of presbyopia.
Only reports using the ICL are presently available. Similar success may
be obtained with the use of other phakic intraocular lenses.