Dietrich, T. and Viestenz, A. and Langenbucher, A. and Naumann, G. O. H. and Seitz, B. (2011) Accuracy of IOL Power Prediction in Cataract Surgery after Penetrating Keratoplasty - Retrospective Study of 72 Eyes. KLINISCHE MONATSBLATTER FUR AUGENHEILKUNDE, 228 (8). pp. 698-703. ISSN 0023-2165,
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Background: In concomitant cataract surgery and penetrating keratoplasty (PKP), the sequential procedure is supposed to have a higher accuracy in calculation of the intraocular lens (IOL) power compared to the triple procedure. The purpose of this study was to evaluate the refractive results of cataract surgery in patients after PKP. Materials and Methods: Our retrospective study included 72 operations on 65 patients. In 35 eyes (group 1, G1), all corneal sutures had been removed before cataract surgery (median time interval after PKP 3.1 years), while in 37 eyes (group 2, G2) corneal sutures were in place but removed intra-or postoperatively (median time interval after PKP 1.5 years). Mean age of the patients (65/67 years), mean target refraction (-1.8 diopters, D), and mean follow-up interval (2.9/3.4 years) were comparable in G1/G2. Preand postoperatively refraction, keratometry, and best corrected visual acuity were recorded. Main outcome measures included the deviation of the spherical equivalent of the real refraction from the target refraction after cataract surgery. Results: In G1/G2 median visual acuity increased from preoperatively 0.2/0.15 to 0.6/0.5 after a follow-up period of 3 years on average. Mean deviation from target refraction was -0.3 +/- 2.2 (-4.95 to+3.15) D in G1 and -0.4 +/- 3.0 (-7.3 to+7.25) D in G2. After cataract surgery, the steepening of the cornea on average was significantly less in G1 (0.5 +/- 1.6 D) than it was in G2 (3.3 +/- 2.1 D; p = 0.003). Conclusions: Although the mean deviation from target refraction is minimal after cataract surgery following PKP, our results indicate a high level of variability. If corneal sutures have been completely removed before biometry, the accuracy of the IOL power calculation seems to be better.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INTRAOCULAR-LENS IMPLANTATION; FUCHS ENDOTHELIAL DYSTROPHY; TRIPLE PROCEDURE; SUTURE REMOVAL; VISUAL-ACUITY; EXTRACTION; ASTIGMATISM; cornea; cataract; IOL power prediction; penetrating keratoplasty; refractive outcome; triple procedure |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Augenheilkunde |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Jun 2020 12:52 |
| Last Modified: | 02 Jun 2020 12:52 |
| URI: | https://pred.uni-regensburg.de/id/eprint/20454 |
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