الفهرس 
Anatomy Of The CorneaOnly 14 pages are availabe for public view
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Abstract
Correction of refractive errors has evolved greatly from mere correction with lens to reshaping the cornea itself and with one idea in mind to focus the image on the retina.
ICRS are a new minimally invasive intervention for the treatment of keratoconus, and post LASIK keratectasia.
Implantation of ICRS offers a potential alternative to corneal transplant or may delay the need for corneal transplant. Compared to corneal transplant, the potential benefits of ICRS include reduced recovery time, ability to treat both eyes at the same time, and possibility of explantation if necessary.
The ICRS have the flexibility for patients and surgeons alike with its potential for a reversible refractive effect and adjustability. Removal of the ICRS appears to result in a return of the corneal curvature to its preoperative status. Adjustability of the refractive effect by removal of the original ICRS implant allows for an exchange procedure in which a thicker or thinner device may be substituted to achieve a greater or lesser correction, as required to obtain satisfactory results for the patient.
Early clinical results indicate that ICRS is well tolerated and that the surgical procedure appears to be performed and reproduce easily. Stability of UCVA, maintenance of BSCVA and stability of refractive effect are satisfying.
Complications with the ICRS procedure to date have been managed easily and are related primarily to the learning curve associated with a new and evolving surgical technique. In the cases in which the ICRS product has been explanted, the refractive effect has been shown to be reversible.
Further studies are needed for assessment of the effectiveness of ICRS in treatment of keratoconus and post LASIK keratectasia.
Intracorneal Inlay is tolerated relatively well by stromal tissue, providing a reasonably stable and predictable way to correct moderate hyperopia.
Inlays offer an alternative to invasive surgery; nevertheless, we must consider the poor predictability and the long list of complications. With the materials currently available, and considering the results, we cannot recommend this procedure at this time.
Further investigation is merited to more fully evaluate the ICRS and Intracorneal Inlay potential as an approach to modifying anterior corneal curvature for the correction of refractive errors.