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. 2024 Oct 2:18:2741-2749.
doi: 10.2147/OPTH.S472606. eCollection 2024.

One-Year Results of a Posterior Chamber Toric Phakic Intraocular Lens Implantation in Patients with Keratoconus

Kepa Balparda  1   2   3 , Mariana Escobar Giraldo  4 , Yeliana M Valencia Gómez  5 , Isabela Franco Sánchez  6 , Tatiana Herrera Chalarca  2
Affiliations

One-Year Results of a Posterior Chamber Toric Phakic Intraocular Lens Implantation in Patients with Keratoconus

Kepa Balparda et al. Clin Ophthalmol. .

Abstract

Purpose: To determine clinical and refractive results after the implantation of EyeCryl Phakic Toric intraocular lens in patients with stable keratoconus.

Methods: The study included all patients diagnosed with keratoconus who underwent implantation of an EyeCryl Phakic Toric intraocular lens (Biotech Healthcare Holding; Ahmedabad, India) in at least one eye and had a follow-up of at least 12 months. Visual and refractive data were collected for all patients, along with corneal tomography measurements using Pentacam, and vault measurement using optical coherence tomography. This retrospective study was conducted at a high-volume private refractive surgery center in Medellín, Colombia.

Results: A total of 83 eyes from 47 patients were included in the study. The majority (71.1%) were female, with a mean age of 31.2 ± 5.1 years. After 12 months of follow-up post-surgery, the spherical equivalent improved significantly from -8.19 ± 4.04 D to -0.06 ± 0.48 D (p < 0.001). Furthermore, 77% of eyes had a post-surgical spherical equivalent within ±0.50 D, while 92% had residual astigmatism ≤0.50 D. Twelve months after surgery, mean manifest astigmatism was -0.28 ± 0.27 D. Uncorrected visual acuity also showed improvement, from 1.11 ± 0.35 LogMAR to 0.14 ± 0.11 LogMAR. Moreover, 52.4% of eyes demonstrated an improvement of at least one line in best-corrected visual acuity. Notably, no intraoperative or postoperative complications were observed in the study population.

Conclusion: The implantation of EyeCryl Phakic Toric intraocular lenses represents a highly effective and safe option for correcting refractive errors in patients with a history of keratoconus. Refractive accuracy is excellent, and a significant proportion of patients experienced an improvement in their best-corrected vision by at least one line.

Keywords: intraocular; keratoconus; lens implantation; refractive error.

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Conflict of interest statement

The lead author (K.B.) is a paid consultant and speaker for Biotech Healthcare and participates in educational and training programs for other surgeons on the use of the brand’s products. However, Biotech Healthcare had no role, influence, or involvement in the design, data collection, statistical analysis, or writing of this article. They also had no role in the decision to conduct or publish the study and did not have access to any individual patient databases. The author received no compensation for conducting this study. The other co-authors have no conflicts of interest to declare.

Figures

Figure 1
Figure 1
Visual and refractive results in the studied cohort.
Figure 2
Figure 2
Clinical photograph of a patient belonging to this study, with a history of previous corneal ring implantation by another surgeon, who underwent EyeCryl Phakic Toric intraocular lens implantation.
Figure 3
Figure 3
Scheimpflug-based image corresponding to one of the patients in the study. Please note the presence of the phakic lens (A) along with the intra-stromal ring. Scheimpflug-based vault measurement is 485 micrometers.
See this image and copyright information in PMC

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References

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