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Repeatability and Agreement of 4 Biometers Measuring Corneal Astigmatism in Eyes With Irregular Corneal Astigmatism Component.
Wang, Lan; Shao, Xu; Fu, Jin-Ling; Hu, Jing-Jing; Zhou, Kai-Jing; Li, Ran; Yu, A-Yong.
Afiliación
  • Wang L; From the National Clinical Research Center for Ocular Diseases, Eye Hospital (L.W., X.S., J.L.F., J.J.H., K.J.Z., R.L., A.Y.Y.), Wenzhou Medical University, Wenzhou, China.
  • Shao X; From the National Clinical Research Center for Ocular Diseases, Eye Hospital (L.W., X.S., J.L.F., J.J.H., K.J.Z., R.L., A.Y.Y.), Wenzhou Medical University, Wenzhou, China.
  • Fu JL; From the National Clinical Research Center for Ocular Diseases, Eye Hospital (L.W., X.S., J.L.F., J.J.H., K.J.Z., R.L., A.Y.Y.), Wenzhou Medical University, Wenzhou, China.
  • Hu JJ; From the National Clinical Research Center for Ocular Diseases, Eye Hospital (L.W., X.S., J.L.F., J.J.H., K.J.Z., R.L., A.Y.Y.), Wenzhou Medical University, Wenzhou, China.
  • Zhou KJ; From the National Clinical Research Center for Ocular Diseases, Eye Hospital (L.W., X.S., J.L.F., J.J.H., K.J.Z., R.L., A.Y.Y.), Wenzhou Medical University, Wenzhou, China.
  • Li R; From the National Clinical Research Center for Ocular Diseases, Eye Hospital (L.W., X.S., J.L.F., J.J.H., K.J.Z., R.L., A.Y.Y.), Wenzhou Medical University, Wenzhou, China.
  • Yu AY; From the National Clinical Research Center for Ocular Diseases, Eye Hospital (L.W., X.S., J.L.F., J.J.H., K.J.Z., R.L., A.Y.Y.), Wenzhou Medical University, Wenzhou, China; National Engineering Research Center of Ophthalmology and Optometry, Eye Hospital (A.Y.Y.), Wenzhou Medical University, Wenzhou
Am J Ophthalmol ; 265: 200-212, 2024 Sep.
Article en En | MEDLINE | ID: mdl-38719132
ABSTRACT

PURPOSE:

To investigate the repeatability and agreement of corneal astigmatism measurements in eyes with irregular corneal astigmatism component (ICAC) using four devices IOLMaster 700 biometer, Lenstar 900 biometer, iTrace, and Pentacam.

DESIGN:

Prospective cross-sectional reliability analysis.

METHODS:

Sixty-four eyes (52 patients) with ICAC were examined three times using the four devices. The eye with ICAC in this study is defined as the cornea has a certain degree of irregular astigmatism (asymmetric and/or skewed bowtie pattern of corneal topography according to corneal topography classification), accompanied with total corneal higher-order aberrations in the 4 mm zone of 0.3 µm or greater. Corneal astigmatism was evaluated using three categories anterior corneal astigmatism (ACA), posterior corneal astigmatism, and total corneal astigmatism (TCA). The repeatability was determined using the ∆Ast (arithmetic mean of vector differences among three repeated corneal astigmatism measurements). Bland-Altman plots and astigmatism vector analyses were employed to assess agreement.

RESULTS:

The IOLMaster 700 (∆Ast = 0.27 ± 0.20 D) showcased higher repeatability in ACA measurements compared to iTrace (∆Ast = 0.37 ± 0.38 D, P = .040) and Pentacam (∆Ast = 0.50 ± 0.22 D, P < .001), and paralleled the performance of Lenstar 900 (∆Ast = 0.31 ± 0.26 D, P = .338). The Pentacam (∆Ast = 0.09 ± 0.07 D, P < .001) demonstrated superior repeatability in posterior corneal astigmatism, whereas the IOLMaster 700 (∆Ast = 0.33 ± 0.23 D, P < .001) excelled in TCA. The IOLMaster 700 exhibited good agreement with either Lenstar 900 or iTrace, characterized by narrow 95% limits of agreement and clinically acceptable vector differences. Conversely, vector differences between Pentacam and the other three devices in ACA and TCA measurements were clinically significant, exceeding 0.50 D (all P < .05).

CONCLUSIONS:

In terms of repeatability of corneal astigmatism measurements in eyes with ICAC, the IOLMaster 700 and Lenstar 900 outperformed iTrace and Pentacam. While the IOLMaster 700 can be used interchangeably with either Lenstar 900 or iTrace, the Pentacam is not interchangeable with the other three devices.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Astigmatismo / Biometría / Córnea / Topografía de la Córnea Límite: Adult / Aged / Female / Humans / Male / Middle aged Idioma: En Revista: Am J Ophthalmol Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Astigmatismo / Biometría / Córnea / Topografía de la Córnea Límite: Adult / Aged / Female / Humans / Male / Middle aged Idioma: En Revista: Am J Ophthalmol Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos