Safety, Efficacy, and Accuracy Data on Posterior Chamber Phakic IOL Use in Private Practice Series of Patients
Narrative Responses:
Purpose
To determine complication rates, their risk factors and the refractive accuracy of posterior chamber phakic IOLs in a private practice series of patients.
Methods
This is a retrospective review of 235 eyes undergoing posterior chamber phakic IOL surgery. Preop age, degree of myopia, peripheral iridotomy technique and the method of lens sizing were noted for each patient. The number of complications and type of secondary interventions were noted and included lens exchanges, cataract surgery, subsequent LASIK/PRK surgery and interventions for elevated IOP. Final postoperative visual acuity was recorded for all patients. Postoperative residual refractive errors were also compared to the expected result based on preoperative calculations.
Results
Results are still being tabulated. The mean absolute error is currently 0.5D and the mean error is 0.3D. 40% of eyes have the same or better postop UCVA when compared to preop BCVA. Cataract incidence is related to increased age and increased degree of myopia and is around 1% in patients who are within the FDA approved range for this surgery. IOP elevations are very rare in the presence of patent PIs regardless of how they are created.
Conclusion
Posterior chamber phakic IOL surgery is a safe and effective treatment option for myopia. Complication rates are very low when patient selection follows FDA guidelines for age and degree of myopia.