Toric Collagen Copolymer Phakic IOL in Patients With Keratoconus and Previous Intracorneal Ring Segment Implantation
To evaluate efficacy of implantable collamer toric phakic intraocular lens to correct high residual myopia, in patients with advanced keratoconus or corneal irregularity who previously underwent intracorneal ring segment implantation.
A longitudinal and prospective study in 41 advanced keratoconus eyes who underwent implantable collamer toric phakic intraocular lens with residual myopia and astigmatism with spherical equivalent more and equal - 6.00 diopters with intracorneal ring segment implantation 2 years previous. The key parameters we study: uncorrected visual acuity, best corrected visual acuity, spherical equivalent and keratometry. Endothelial cell count, 6 months follow-up.
Forty-one advance keratoconus eyes with intracorneal rings segment with uncorrected visual acuity improve from 1.0 LogMAR mean to 0.2 LogMAR mean after phakic intraocular lens implatation. The spherical equivalent range preop between -6.00 Diopters to -14.00 Diopters Preop means (-8.00D), SE improve to 0.98 Diopters SE means after phakic IOLs. Endothelial cells preop 2900 (cells/mm2) after six months post 2800 cells/mm2.
Phakic IOLs to correct myopia in patients with intracorneal ring segment in advance keratoconus was an effective procedure. Important reduction of the spheric equivalent although astigmatism did not improve by the creation of the incision It was well tolerated by most patients. Long-term endothelial safety must be assessed.