Refraction and Its Components, During the Growth of the Eye from the Age of Three.

Regan, Ellen F.

doi:10.1001/archopht.1962.00960020837026

Cited by 1 publication

(2 citation statements)

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“…We demonstrated the relevance of mean corneal curvature and astigmatism according to axial length via simultaneous ARK, Scheimpflug imaging system, ray-tracing aberrometry, and partial coherence interferometry evaluations. In a previous study, partial coherence interferometry showed higher astigmatism as compared with Scheimpflug imaging system, ray-tracing aberrometry, Atlas corneal topography, and Galilei dual Scheimpflug analyzer measurements 4 , 11 . In our study, we were able to compare each modality in order to evaluate mean corneal curvature and corneal astigmatism using bivariate correlation.…”

Section: Discussionmentioning

confidence: 82%

“…As mentioned above, axial length is the most powerful determinant of refractive error and it is well known that myopia is the most prevalent refractive error worldwide 1 . Previous studies have suggested that structural changes resulting in myopia occur due to stretching in the periphery parallel to the visual axis, posterior pole elongation, and global expansion of the vitreous chamber 4 – 6 . Many studies have examined the relationship between myopia and corneal curvature with inconsistent findings.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of keratometric measurements in accordance with axial length in an aged population

Han

Ryu

Jung

et al. 2022

Sci Rep

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To investigate keratometric measurements according to axial length in an aged population. Patients requiring cataract surgery with keratometric measurements from four different ophthalmic devices (autorefractor/keratometer, Scheimpflug imaging, corneal topography/ray-tracing aberrometry, and partial coherence interferometry) between January 2016 and March 2021 were reviewed retrospectively. Cases for which four ophthalmic devices were deployed in the same order a day were included in this investigation. The corneal curvature of the flattest and steepest meridian, mean corneal curvature, corneal astigmatism, steepest axis location, and axial length were evaluated. In total, 250 eyes (137 patients) were included in the analysis. A negative correlation was found between mean corneal curvature and axial length, with correlation coefficients of 0.587, 0.592, 0.588, 0.591, 0.588, and 0.562 for autorefractor/keratometer, Scheimpflug imaging, corneal topography/ray-tracing aberrometry, partial coherence interferometry, total corneal refractive power of Scheimpflug imaging, and simulated keratometry of corneal topography/ray-tracing aberrometry measurements, respectively. No statistically significant differences were found for corneal astigmatism according to axial length. In axial length group of less than 26.0 mm, negative correlation was found between axial length and mean frontal corneal curvature while no correlation was found between axial length and corneal astigmatism. All four ophthalmic devices showed good inter-device reliability for mean corneal curvature but not corneal astigmatism.

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Section: Discussionmentioning

confidence: 82%