الفهرس 
Aim of the WorkOnly 14 pages are availabe for public view
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Abstract
For a long time, many trials have been done in order to correct refractive errors. This was either with classical approaches such as spectacles and contact lenses or by refractive surgeries which have become an acceptable alternative for a large number of patients and surgeons over the past three decades.
Phakic IOL with its different types has become one of these surgical alternatives. The present work studied the effects of both Foldable iris-fixated anterior chamber pIOL (VeriFlex) (by AMO) and posterior chamber pIOL (ICL) (by STAAR Surgical) and compared them together.
Our study included forty eyes with high myopia. Twenty eyes, with spherical error ranging from -9.0D to -15.0D, were implanted with VeriFlex. Other twenty eyes, with spherical error ranging from -8.0D to -18.0D, were implanted with ICL.
In both types; the surgery was safe, effective, predictable and had a low complication rate. It also provided rapid visual rehabilitation and long term stability.
Follow up of these eyes has been done for one year postoperative. We found that, The BCVA improved one to two lines from the preoperative values in both types and the refractive results of both type were stable.
Regarding the Intraocular pressure (IOP); VeriFlex only one eye developed steroid induced glaucoma in the first week postoperative which was normalized within two days after replacement of steroids with NSAIDs eye drops and use of antiglaucoma eye drops. In case of ICL, One eye had developed acute rise of IOP in the first day postoperative, this was due to insufficient size of PI. This patient went for another surgical iridectomy one week after surgery.
As for the endothelial cell count; VeriFlex led to a decrease in the mean endothelial cell count which was 5.4% at the end of the follow up period. While, ICL led to a much less decrease in the mean endothelial cell loss which was only 1.53% at the end of the follow up period. There was statistically highly significant difference between the two groups in percentage endothelial cell loss (P <0.001), with more loss with VeriFlex. Therefore, the ICL was superior over the VeriFlex as regards the effect on corneal endothelium.
On the other hand; our follow up visits revealed some complications that could be met with these types of pIOLs.
Postoperative uveitis in the form of subclinical chronic anterior uveitis had been reported nearly in all eyes implanted with VeriFlex which had disappeared in all eyes by the end of the 1st month after surgery. While in case of ICL; the clinical signs of anterior chamber inflammation disappeared by the end of the 1st week after surgery in all eyes.
IOL dislocation had not occurred in any eye implanted with both lenses.
Pupil ovalization was reported only in one eye in case of VeriFlex and was visually insignificant and not accompanied by any other problem. While in case of ICL, it was not found in any eye.
One eye only implanted with ICL developed Crystalline lens opacity which was due to low vault.
Both types of pIOLs caused neither retinal detachment, nor pupillary block.
Hence, the comparison between the two types of pIOLs proved that the ICL was superior over the VeriFlex as regards the effect on corneal endothelium .and they were equal as regards predictability, efficacy and the effect on IOP.