Accuracy of Intraocular Lens Calculation Formulas.
Ophthalmology
; 125(2): 169-178, 2018 02.
Article
en En
| MEDLINE
| ID: mdl-28951074
ABSTRACT
PURPOSE:
To compare the accuracy of intraocular lens (IOL) calculation formulas (Barrett Universal II, Haigis, Hoffer Q, Holladay 1, Holladay 2, Olsen, and SRK/T) in the prediction of postoperative refraction using a single optical biometry device.DESIGN:
Retrospective consecutive case series.PARTICIPANTS:
A total of 13 301 cataract operations with an AcrySof SN60WF implant and 5200 operations with a SA60AT implant (Alcon Laboratories, Inc., Fort Worth, TX).METHODS:
All patients undergoing cataract surgery between July 1, 2014, and December 31, 2015, with Lenstar 900 optical biometry were eligible. A single eye per patient was included in the final analysis, resulting in a total of 18 501 cases. We compared the performance of each formula with respect to the error in predicted spherical equivalent and evaluated the effect of applying the Wang-Koch (WK) adjustment for eyes with axial length >25.0 mm on 4 of the formulas.RESULTS:
For the SN60WF, the standard deviation of the prediction error, in order of lowest to highest, was the Barrett Universal II (0.404), Olsen (0.424), Haigis (0.437), Holladay 2 (0.450), Holladay 1 (0.453), SRK/T (0.463), and Hoffer Q (0.473), and the results for the SA60AT were similar. The Barrett formula was significantly better than the other formulas in postoperative refraction prediction (P < 0.01) for both IOL types. Application of the WK axial length modification generally resulted in a shift from hyperopic to myopic outcomes in long eyes.CONCLUSIONS:
Overall, the Barrett Universal II formula had the lowest prediction error for the 2 IOL models studied.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Refracción Ocular
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Biometría
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Óptica y Fotónica
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Hiperopía
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Lentes Intraoculares
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Miopía
Tipo de estudio:
Observational_studies
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Prognostic_studies
Límite:
Aged
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Female
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Humans
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Male
Idioma:
En
Año:
2018
Tipo del documento:
Article