Abstract

BARROSO LORENZO, Raúl et al. Phakic lenses as a therapeutic alternative for keratoconus. Rev Cubana Oftalmol [online]. 2014, vol.27, n.2, pp.237-245. ISSN 0864-2176.

Keratoconus is a degenerative disease characterized by progressive decrease in corneal stroma thickness and cone-shaped deformity of the cornea, with irregular astigmatism and high myopia. A literature review was made on the use of phakic intraocular lens implants as an alternative treatment of this disease, which remains difficult to be managed at present. In treating ametropias with high spherical and cylindrical component, the use of toric phakic lenses showed optimal visual results. Similarly, the use of angle-supported lenses «stretches» the cornea and flattens the central apical area through the haptics, thus decreasing the corneal ectasia, irregular asymmetric astigmatism. The presence of an intraocular lens between the pupil and the cornea creates a physical barrier to avoid the action of aqueous humor against the cornea and allows stabilization of all the corneal parameters after intraocular lens implantation. There are reports about the combination of phakic lens implants after intra stromal rings and crosslinking, with excellent functional results since it increases the uncorrected visual acuity, improves the corneal topography, high order aberrations and reduces the possibilities of corneal transplant. The use of toric phakic lenses in stable keratoconus is a valid therapeutic choice as treatment of the ametropia present in this pathology.

Keywords : keratoconus; phakic lenses; ametropia.

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