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Phakic implantable collamer lens for moderate to high myopia and astigmatism: clinical outcomes of the V4C model

Poster Details

First Author: J.Ferreira Mendes PORTUGAL

Co Author(s):    J. Pires   T. Monteiro   N. Franqueira   F. Faria-Correia   F. Vaz        

Abstract Details


To assess the safety, efficacy, predictability and stability following the use of a posterior chamber phakic implantable collamer lens V4C (Visian ICL, STAAR Surgical Co) in patients with moderate to high myopia and astigmatism.


Ophthalmology department, Hospital de Braga, Portugal


This retrospective study evaluated 43 eyes of 25 patients who underwent ICL implantation (V4c model).25 eyes were implanted with a spherical ICL while 18 eyes were implanted with a toric ICL. Complete ophthalmologic examination was perfomed before surgery and at 1, 6 and 12 months. Lens power was calculated based on subjective refraction, anterior chamber depth (ACD) and keratometric measurements obtained by corneal topography (Pentacam® HR, Oculus). Horizontal and vertical angle-to-angle distance was measured with optical coherence tomography (OCT Visante Omni®, Carl Zeiss Meditec), using these results to calculate the lens diameter.


Mean spherical equivalent refraction after a 6 months follow-up improved from -6,48 ± 3,49 D to 0,22 ± 0,41 D, with an uncorrected distance visual acuity of 0,88 ± 0,18. Change in manifest refraction from week 1 to month 6 was insignificant. 12 months after surgery 93% of eyes were within ± 0,50 D of the targeted correction and 100% were within ± 1,00 D. Average vault was 521,6 ± 332,5 μm. No significant rise in intraocular pressure or secondary cataract occurred in any case during the period of observation.


This retrospective analysis demonstrates that ICL implantation for moderate to high myopia and astigmatism is safe and effective, with predictable refractive results, suggesting its viability as a surgical option for the treatment of such eyes.

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