Analysis After Posterior Chamber Phakic Intraocular Lens Implantation: 17 Years Follow-Up.

To evaluate the clinical outcomes of the Visian implantable collamer lens (ICL) after more than 17 years from implantation.

Hospital la Arruzafa, Córdoba (Spain)

Sixty-four eyes of 33 patients who underwent surgery between 2002-2006 after implantation of the V4 ICL were evaluated. From the pre-intervention data, corrected distance visual acuity (CDVA), refraction and intraocular pressure (IOP) were analysed. At 20 years, corrected distance visual acuity (CDVA), refraction, intraocular pressure (IOP), endothelial count and vault measured with the Tomey Casia 2 anterior pole tomography, as well as long-term events that might occur, were recorded.

The operated patients had a spherical correction between +9 and -21D and a cylinder up to 6D. Of the implanted lenses, V4 ICM, ICH and TICM models of 12.0, 12.5 and 13.0mm length were used.

The mean CDVA (decimal) at the 17-year check-up was 0.88±0.18, with a spherical equivalent of -0.97±1.26D. Intraocular pressure has remained stable as mean measurements prior to surgery and currently, was 15.2±2.43mmHg and 16.1±3.64mmHg respectively. The endothelial cell count showed values of 2131.87±413.27 cells, with a maximum of 2804 cells and a minimum of 1125 cells. Finally, the vault obtained was 382.62±225.37μm. Of the 64 eyes, 10 (15,6%) had to undergo cataract surgery.

The results of this study show the long-term feasibility of V4 ICL implantation as a surgical option for myopia correction.