Posterior chamber collagen copolymer phakic intraocular lenses to correct myopia: five-year follow-up - Instituto Oftalmológico Fernández-Vega

Posterior chamber collagen copolymer phakic intraocular lenses to correct myopia: five-year follow-up

01/05/2011
To evaluate the long-term safety and efficacy of posterior chamber collagen copolymer phakic intraocular lens (pIOL) implantation to correct myopia
AUTHORS.
Alfonso JF, Baamonde B, Fernández-Vega L, Fernandes P, González-Méijome JM, Montés-Micó R.

METHODS.
Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, pIOL vault, endothelial cell loss, and adverse events were evaluated for 5 years after implantation of the Visian Implantable Collamer Lens pIOL for moderate to high myopia.

RESULTS.
The mean spherical equivalent (188 eyes) decreased from -11.17 diopters (D) ± 3.40 (SD) preoperatively to -0.88 ± 0.72 D 5 years postoperatively. The mean change in refraction from 1 month to 5 years was -0.65 ± 0.65 D. The mean UDVA and CDVA (Snellen decimal) were 0.69 ± 0.26 and 0.83 ± 0.15, respectively. The mean safety and efficacy indices were 1.27 ± 0.33 and 0.89 ± 0.35, respectively. No eye lost more than 2 lines of visual acuity; 70% achieved 0.80 or better CDVA. Three eyes (1.6%) developed late anterior subcapsular cataract that was clinically significant in 1 case, leading to pIOL removal and phacoemulsification. Of the 3 eyes (1.6%) with a mild transient increase in intraocular pressure (up to 27 mm Hg), none required a second surgical procedure or prolonged topical medication. The total endothelial cell loss (considered cumulatively at consecutive intervals through 5 years) was 7.7%. There was a tendency toward decreased pIOL vault decrease over time. No vision-threatening complications occurred.

CONCLUSION.
Implantation of the collagen copolymer pIOL for moderate to high myopia was safe and effective and provided long-term predictable, stable refractive results.

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