Standardizing sum-of-segments axial length using refractive index models

Optical biometry uses interferometry to measure the axial length (AL) of the eye. Traditionally, one-variable regression formulas have converted the optical path length measured by a biometer to a geometric AL. An alternate calculation of axial length sums the individual segments of the eye (sum-of-...

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Veröffentlicht in:Biomedical optics express 2020-10, Vol.11 (10), p.5860-5870
Hauptverfasser: Cooke, David L., Cooke, Timothy L., Suheimat, Marwan, Atchison, David A.
Format: Artikel
Sprache:eng
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Zusammenfassung:Optical biometry uses interferometry to measure the axial length (AL) of the eye. Traditionally, one-variable regression formulas have converted the optical path length measured by a biometer to a geometric AL. An alternate calculation of axial length sums the individual segments of the eye (sum-of-segments AL). This calculation has been shown to improve predictions of some intraocular lens power formulas when used in place of traditional axial length. Sum-of-segments ALs are determined from 13 refractive index models. As measured in 1695 eyes, these yield different ocular axial lengths. A path to standardization from these models is presented.
ISSN:2156-7085
2156-7085
DOI:10.1364/BOE.400471