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Saalabian, A.
PhakiC IOL - implantation for correction of high myopia
[ Dissertation ] Medizinische Universität Graz; 2005. pp.77.

Authors Med Uni Graz:
Advisor:: Ardjomand Navid; El-Shabrawi Yosuf
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Abstract:: Cornea refractive surgery are suitable for mild and moderate, but not for high myopia. Phakic intraocular lenses (PIOL) have high potential to correct high myopia or more than -10 diopters (dpt). The risk-benefit ratio associated with phakic anterior IOL implantation demonstrates that foldable phakic IOLs are an acceptable alternative to other means of refractive correction for high ametropia. In this study we present our results concerning to the postoperative quality of vision and the risks and befits. Material and methods: Altogether 9 patients (4 female and 5 male, average age 36,8 years, from 28 years to 53 years), with high myopia (average -12,4dpt, from -18dpt to -7,25 dtp) underwent PIOL implantation in one or both eyes (16 eyes). All surgeries were performed by a similar technique. All patients had an average anterior chamber depth of 3,2 plus/minus 0,3mm (from endothelium to anterior lens capsule). An I-CARE lens was implanted in all cases. The spherical I-CARE-PIOL power was in average -12,4dpt plus/minus 2,6dpt (-7,5 to -18 dpt). Follow up was 12,24 plus/minus 4,53 months. Results: Best corrected spectacle visual acuity (BCSVA) before the Phakic IOL implantation was 0,646 plus/minus 0,137 (min 0,4 to max 0,8). Postoperatively the patients showed an uncorrected visual acuity of 0,62 plus/minus 0,2 and a BCWVA of 0,9 plus/minus 0,147 (min 0,5 to max 1). The average preoperative spherical refraction was -12,393 plus/minus 2,62dpt (from min-18 to max -7,25dpt), after the implantation of the Phakic IOL the postoperative refraction was -0,375 plus/minus 0,853dpt (from min -2,25 to 0,5dpt). The average entothelial cell loss was about 4%. The preoperative endothelial cell number amounted in average 2713 plus/minus 175, the postoperative number of cells was 2608 plus/minus 484. The intraocular pressure (IOP) of our patients was normal before the operation. In average the IOP was 14,8 plus/minus 2,4 (min 10 to max 20). After the first postoperative day there was a significant intensification of the IOP. The average anterior chamber depth measured preoperative an average of 3,171 plus/minus 0,298mm (with a min from 2,8 to max 3,74mm), after the Phakic IOL, the distance between the IOL and corneal epitheial cells had an average value of 1,477 plus/minus 0,209mm (1,1 mm to 1,8mm). The average higher order aberration after the implantation of the I-CARE lens was 0,254 plus/minus 0,091 (min 0,130 to max 0,470). Mild pupil ovalization (ovalization within the IOL optic) was seen in only one eye. The patient was asymptomatic.