Effective lens position. A review
| Autor: | A. N. Kulikov, E. V. Kokareva, A. A. Dzilikhov |
|---|---|
| Jazyk: | ruština |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Офтальмохирургия, Vol 0, Iss 1, Pp 92-97 (2018) |
| Druh dokumentu: | article |
| ISSN: | 0235-4160 2312-4970 |
| DOI: | 10.25276/0235-4160-2018-1-92-97 |
| Popis: | Technological progress, considerable upgrade in medical equipment and phacoemulsification technique make the intraocular lens implantation a standard and predictable procedure. Currently the achieved planned refractive result is responsible for a creation of qualitatively new standards of living and social adaptation in patients and become the main purpose of cataract surgery. An improvement of the biometry accuracy reduces errors of axial length measurement from 66.4% to 1.9%. Thus, the estimation algorithm of effective lens position (ELP) appears as the main reason of refractive «surprises». Recently it is evaluated to be 49.5%. Despite this fact, the ELP, as a calculation component, is used only in some IOL power formulas. A precise algorithm of postoperative IOL position prediction is a difficult problem associated with the development of regression models. And there is a list of anatomical parameters significantly affect this value. However, the appearance of new biometry methods allowed to expand this list. Optical properties and configuration of the implanted lens affecting its positioning in the capsular bag also become an important data for estimation of the effective lens position. The review considers information about widely used IOL calculation formulas applying the postoperative lens position algorithm or ELP with consideration for lens configuration. |
| Databáze: | Directory of Open Access Journals |
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