Visual Results After Trifocal Asqelio Implantation In Refractive Surgery Patients

The objective was to study the visual quality after the implantation of a trifocal intraocular lens in patients undergoing myopic refractive surgery.

In clinical practice, many refractive surgery patients who begin to develop cataracts and their visual acuity has decreased demand surgery to continue eliminating the use of glasses. Although today there are calculators that allow us to reliably obtain the power of the lens to be implanted in this type of patient, there are few publications that study the visual results after the implantation of trifocal intraocular lenses.

This retrospective study included 20 eyes of 11 patients with a prior history of LASIK (laser-assisted in situ keratomileusis) surgery who underwent trifocal Asqelio (AST) implantation. Among the main characteristics of the lens are that it is hydrophobic, diffractive, bispherical and with a spherical aberration of -0.27 microns. 

Both preoperatively and one month after surgery, monocular visual acuity without correction in distance (UDVA) and near (UNVA) was measured with the ETDRS optotype, visual acuity with correction in distance (CDVA) and refraction was performed. In addition, other tests were performed such as corneal topography with Pentacam and aberrometry with Itrace.

One month after surgery, mean AVL was 0.14 ± 0.17 LogMAR, AVC 0.11 ± 0.18 LogMAR, and AVCL improved to 0.11 ± 0.14 LogMAR. The mean spherical equivalent (SE) changed from -1.61 ± 1.88 D preoperatively to -0.07 ± 0.17 D at one month, with only 10% of eyes improving with refraction.

The preoperative mean corneal RMS (Root Mean Square) obtained with the Pentacam was 2.17 ± 0.94 microns, the corneal spherical aberration (AE) was 0.47 ± 0.27 microns and the effective keratometric reading (EKR) was 39.71 ± 2.01 D. With the Itrace, the preoperative total RMS was obtained as 1.69 ± 1.74 microns and the postoperative one was reduced to 0.41 ± 0.22 microns.

The Asqelio trifocal lens provides good visual results in patients undergoing previous myopic refractive surgery.