Results of Posterior Chamber Phakic IOL in Patients With Nonprogressive Keratoconus
To evaluate the visual results of posterior chamber toric implantable collamer lens (TICL) implantation in keratoconic (KC) patients with myopia and astigmatism.
Retrospective noncomparative study of consecutive KC patients underwent TICL implantation between March 2008 and October 2013. KC patients with astigmatism less than 6 diopters, absence of corneal scaring & best spectacle corrected visual acuity (BSCVA) 20/40 or better were included in study. Outcomes were measured in terms uncorrected visual acuity (UCVA), BSCVA, refraction, topography, safety, efficacy of procedure and adverse events.
Forty-eight eyes of 32 patients with the mean age of 26.5 years were included in the analysis. Mean UCVA and BSCVA improved from CF and 20/30 preoperatively to 20/30 and 20/25 post-operatively respectively. The mean clinical spherical equivalent decreased from -9.41D to -0.24D post-operatively. The mean clinical and autorefractometer astigmatism decreased from -3.0D and -4.1D to -0.6D and -0.9D post-operatively respectively. The mean improvement of 7 lines in UCVA and 2 lines in BSCVA. None of the patient lost any line in UCVA or BCVA. There was no intra-operative complication. Mean follow-up 14.3 months.
The results confirm that TICL implantation is a predictable, safe and effective treatment option for improving VA in patients with KC. Stability of KC should be ensured prior to TICL implantation.