Higher Order Aberrations after Implantation of an Anterior Chamber Iris-claw Phakic Lens (Ophtec Artisan)
Bühren J., Kasper T., Terzi E., Kohnen T.
University Eye Hospital Frankfurt/Main
Purpose: The implantation of refractive IOLs into the phakic eye ("phakic lens", pIOL) provides the means of correction of high myopia, even in cases where corneo-ablative procedures are contraindicated because of optical reasons. In the present study we demonstrate the change of higher order (3rd to 5th order) ocular aberrations after implantation of an iris-claw pIOL (Ophtec Artisan).
Method: 13 eyes of 7 patients were examined pre-operatively and 1 month after implantation of an Artisan lens (Ophtec). The mean pre-operative spherical equivalent was -10.69 ±1.74 dpt (-8.5 to -14.5 dpt); the diameter of the IOL optic was 6 mm. Wavefront measurements were performed with a HARTMANN-SHACK sensor (Zywave, Bausch & Lomb) in mydriasis. The root mean square (RMS) wavefront error was computed for all aberrations of 3rd to 5th order for pupil diameters of 3.5 and 6 mm.
Results: On average, HOA RMS changed for a 3.5 mm pupil by 0.037 ± 0.089 mm (6 mm-pupil: 0.405 ± 0.245 mm). 3rd order aberrations changed by 0.031 ±0.098 mm (0.320 ±0.269 mm). For both pupil diameters, a notable increase of the trefoil component Z 3,-3 of 0.117 ± 0.085 mm (0.596 ± 0.350 mm) could be observed. 4th
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