Academic Journal
Intraocular lens power calculation with ray tracing based on AS-OCT and adjusted axial length after myopic excimer laser surgery
| العنوان: | Intraocular lens power calculation with ray tracing based on AS-OCT and adjusted axial length after myopic excimer laser surgery |
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| المؤلفون: | Savini, Giacomo, Hoffer, Kenneth J., Ribeiro, Filomena J., Dias, Joao Mendanha, Coutinho, Catarina P., Barboni, Piero, Schiano-Lomoriello, Domenico |
| المصدر: | Journal of Cataract and Refractive Surgery ; volume 48, issue 8, page 947-953 ; ISSN 0886-3350 1873-4502 |
| بيانات النشر: | Ovid Technologies (Wolters Kluwer Health) |
| سنة النشر: | 2022 |
| الوصف: | Purpose: To report the results of intraocular lens (IOL) power calculation by ray tracing in eyes with previous myopic excimer laser surgery. Setting: G.B. Bietti Foundation I.R.C.C.S., Rome, Italy. Design: Retrospective interventional case series. Methods: A series of consecutive patients undergoing phacoemulsification and IOL implantation after myopic excimer laser was investigated. IOL power was calculated using ray-tracing software available on the anterior segment optical coherence tomographer MS-39. Axial length (AL) was measured by optical biometry, and 4 values were investigated: (1) that from the printout, (2) the modified Wang/Koch formula, and (3) the polynomial equation for the Holladay 1 and (4) for the Holladay 2 formulas. The mean prediction error (PE), median absolute error (MedAE), and percentage of eyes with a PE within ±0.50 diopters (D) were reported. Results: The study enrolled 39 eyes. Entering the original AL into ray tracing led to a mean hyperopic PE (+0.56 ±0.54 D), whereas with the Wang/Koch formula, a mean myopic PE (−0.41 ±0.53 D) was obtained. The Holladay 1 and 2 polynomial equations lead to the lowest PEs (−0.10 ±0.49 D and +0.08 ±0.49 D, respectively), lowest MedAE (0.37 D and 0.25 D), and highest percentages of eyes with a PE within ±0.50 D (71.79% and 76.92%). Calculations based on the Holladay 2 polynomial equation showed a statistically significant difference compared with other methods used (including Barrett-True K formula), with the only exception of the Holladay 1 polynomial equation. Conclusions: IOL power was accurately calculated by ray tracing with adjusted AL according to the Holladay 2 polynomial equation. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1097/j.jcrs.0000000000000902 |
| الاتاحة: | http://dx.doi.org/10.1097/j.jcrs.0000000000000902 https://journals.lww.com/10.1097/j.jcrs.0000000000000902 |
| رقم الانضمام: | edsbas.9C8957DF |
| قاعدة البيانات: | BASE |
| DOI: | 10.1097/j.jcrs.0000000000000902 |
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