Toric Phakic IOL in Keratoconus Patients: 10-Year Follow-up
Narrative Responses:
Purpose
To study the long-term safety and efficacy of the Staar toric phakic lens in patients with keratoconus.
Methods
This is a prospective study of 72 patients that were diagnosed with keratoconus and a minimum age of 21 years with the topographic and clinical diagnosis of keratoconus. The patients have now been followed for at least ten years and this report is looking at the refractive stability of the procedure, the changes in corneal topography, rotational stability of the lens in the sulcus and also at the early and late complications associated with the intervention.
Results
The patients were followed for a minimum of ten years. The average spherical equivalent was -12.0D and the average cylinder was 3.5D. The patients had a mean pre-op best corrected visual acuity of 20/40 and a mean post-operative visual acuity of 20/25. The mean pre-operative keratometric reading pre-op was 49D. The mean post-operative cylinder improved to 1.00D. All cases were chosen with a minimum ACD of 2.8mm. The lens remained within 5 degrees of the predicted axis in 90% of the cases and the position remained unchanged.
Conclusion
This study demonstrates that the Staar Toric ICL is safe and effective in the treatment of keratoconus. The Toric ICL remained stable without axis rotation over the prolonged period of follow-up. Careful attention must be given to the selection of the appropriate size to avoid glaucoma through excessive vaulting.