CLEAR LENS EXTRACTION VERSUS PHAKIC IOL IMPLANTATION IN SURGICAL TREATMENT OF HIGH MYOPIA

Abstract

In the Myopic eye, is the diopetric system lies in front of the retina, in other word, parallel rays derived from infinitely remote object units in the myopic eye focus in front of the retina when the eye is at rest (Donders, 1864). Keratorefractive surgeries, such as LASIK has limitations when used for the correction of high refractive errors that is why using phakic IOLs and CLE as an alternative have grown in popularity recently as a consequence of LASIK in potentially unsatisfactory results (Gimbel, 2005). Despite the ease to correct any spherical ametropia by means of clear lens exchange by an appropriate PC IOL, the loss of accommodation and some retinal risks mainly in myopia do not advise this type of surgery in young patients but advised in mid 50s patients with using one of the three common types of pseudophakic IOLs: monofocal, multifocal and accommodative. The incidence of retinal detachment after CLE reported in many studies is variable ranging from 0% - 8% which is relatively high. Careful fundus The purpose of the optical treatment of myopia is to take back the formed image to lie on the retina. There are many options for correction of high myopia .The most popular non-surgical option is laser In-situ keratomileusis (LASIK) while on the other side both  2 Introduction and Aim of the Work phakic intraocular lens implantation (IOL) and clear lens extraction (CLE) are the most popular surgical option (Gimbel, 2005) There is a fast evolution in the design of the Phakic IOLs for the protection of the corneal endothelium from damage and to decrease complications like cataract, pupil distortion and glaucoma due to pupillary block. AIM OF THE WORK: Review of literatures talking about differences betw