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First Author: F.Sanchez Leon MEXICO
Co Author(s): S. Sarabia E. Broker
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To evaluate efficacy of a small aperture inlay implanted in presbyopes who have previously undergone a LASIK procedure.
Novavision Laser Center, Mexico City
Analysis of a series of6post-LASIK presbyopes implanted with a small aperture corneal inlay (KAMRA inlay, AcuFocus, Inc.). Elapsed time between the previous LASIK procedure and inlay implantation ranged from 42 to 113 months,with a mean of 93.42 months. Patients were between the ages of 45 and 60. Additional patient selection criteria included uncorrected distance visual acuity (UCDVA) of 20/20 or better in the untreated eye, uncorrected near visual acuity (UCNVA) of 20/50 or J4 or better in the untreated eye, SE -0.75D to plano, and >0.75D cylinder. Prior LASIK flap thickness needed to be< 160 ?m with corneal thickness >480 ?m and normal corneal topography. A femtosecond-laser created pocket was created below the prior LASIK interface at 250 ?m in the non-dominant eye. Post-operative measurements included visual acuities, corneal thickness via ultrasound pachymetry (Sonogage, Inc.), Fourier domain OCT (FD-OCT, Optovue, Inc.), and flap thickness using FD-OCT.
At 12-months post-op, UCNVA improved4 lines from pre-op, from J5to J1.Mean UCDVA was 20/20 pre-operatively and 20/25 at 12-months post-op. Mean central corneal thickness showed good correlation between pachymetry (524.7 ±33.2 ?m) and FD-OCT (526.6 ±17.3 ?m). Mean distance between flap and pocket interfaces was 138.1 ?m. FD OCT showed a mean of 256 ?m forachieved inlay depth. These results are consistent with results from the global data registry on post-LASIK patients implanted with a small aperture inlay.
In this study, insertion of a small aperture corneal inlay in a pocket under an existing LASIK flap resulted in a statistically significant improvement in near vision. The procedure appears to be safe and effective in treating presbyopic patients who have undergone a previous LASIK procedure.
... is employed by a for-profit company with an interest in the subject of the presentation