Project hyperopic power prediction: accuracy of 13 different concepts for intraocular lens calculation in short eyes.

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  • Additional Information
    • Source:
      Publisher: BMJ Pub. Group Country of Publication: England NLM ID: 0421041 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1468-2079 (Electronic) Linking ISSN: 00071161 NLM ISO Abbreviation: Br J Ophthalmol Subsets: MEDLINE
    • Publication Information:
      Publication: Jan. 1992- : London : BMJ Pub. Group
      Original Publication: 1917-Dec. 1991: London : British Medical Association
    • Subject Terms:
      Hyperopia*/surgery ; Lenses, Intraocular* ; Phacoemulsification*; Axial Length, Eye ; Biometry ; Humans ; Lens Implantation, Intraocular ; Optics and Photonics ; Refraction, Ocular ; Retrospective Studies
    • Abstract:
      Purpose: To evaluate the accuracy of intraocular lens (IOL) power calculation in a patient cohort with short axial eye length to assess the performance of IOL power calculation schemes in strong hyperopes.
      Methodology: The study was a single centre, single surgeon retrospective consecutive case series at the Augen- und Laserklinik, Castrop-Rauxel, Germany. Inclusion of patients after uneventful cataract surgery implanting either spherical (SA60AT) or aspheric (ZCB00) IOLs. Inclusion criteria were axial eye length <21.5 mm and/or emmetropising IOL power >28.5 D. Lens constants were optimised on a separate patient cohort considering the full bandwidth of axial eye length. Data of one single eye per patient were randomly included. The outcome measures were: mean absolute prediction error (MAE), median absolute prediction error, mean prediction error with SD and median prediction error and the percentage of eyes with an MAE within 0.25 D, 0.5 D, 0.75 D and 1.0 D.
      Results: A total of 150 eyes from 150 patients were assessed. Okulix, PEARL-DGS, Kane and Castrop provided a statistically significantly smaller MAE compared with the Hoffer Q and SRK/T formulae.
      Conclusion: In our patient cohort with short axial eye length, the use of PEARL-DGS, Okulix, Kane or Castrop formulae showed the lowest MAE. The Castrop formula has not been published before, but will be disclosed with a ready-to-use Excel sheet as an addendum to this paper.
      Competing Interests: Competing interests: None declared.
      (© Author(s) (or their employer(s)) 2022. No commercial re-use. See rights and permissions. Published by BMJ.)
    • Contributed Indexing:
      Keywords: lens and zonules; optics and refraction; posterior chamber
    • Publication Date:
      Date Created: 20210128 Date Completed: 20220524 Latest Revision: 20220722
    • Publication Date:
      20231215
    • Accession Number:
      10.1136/bjophthalmol-2020-318272
    • Accession Number:
      33504489