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Corneal topography in preterm children aged 2 years to 12 years with or without retinopathy of prematurity

Abstract

Objectives

To evaluate corneal topography in full-term and preterm children with or without retinopathy of prematurity (ROP).

Methods

We enrolled children aged from 2 years to 12 years between January 2019 and May 2021 in the following four groups: full-term (group 1), premature without ROP (group 2), untreated premature with ROP (group 3), and laser-treated and/or intravitreal injection (IVI) of anti-vascular endothelial growth factor (VEGF)-treated premature with ROP (group 4). Corneal topography was measured with the Galilei Placido-dual Scheimpflug analyzer G4 every half year, and was compared among the groups using generalized estimating equation models at approximately 7 years of age.

Results

We included 77, 178, 45, and 131 participants in groups 1, 2, 3, and 4, respectively. The mean (standard deviation) number of visits per patient was 2.9 (1.4). Compared with full-term eyes, premature eyes demonstrated steeper anterior corneal curvature (p = 0.016 and p = 0.008 for the mean and steep K, respectively), higher anterior and posterior corneal astigmatism (p = 0.036 and p = 0.016, respectively), and thinner thinnest pachymetry (p < 0.001). The laser-treated ROP eyes displayed steeper anterior corneal curvature (p = 0.040 for steep K) and higher anterior corneal astigmatism (p = 0.005) than the IVI-treated eyes. Moreover, they exhibited high cone location and magnitude index (1.96) reaching the cut-off for detecting keratoconus (1.82).

Conclusions

The premature status led to greater corneal ectasia, and laser treatment for ROP caused further corneal steepness. Higher anterior corneal astigmatism was associated with laser treatment. The ROP pathology and IVI anti-VEGF treatment exerted a marginal effect on corneal topography.

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Data availability

The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors would like to thank Ping-Hsuan, Huang for the statistical assistance and wish to acknowledge the support of the Maintenance Project of the Center for Big Data Analytics and Statistics (Grant CLRPG3D0049) at the Chang Gung Memorial Hospital for the study design and the monitoring, data analysis, and interpretation.

Funding

This study was supported by grants from the Chang Gung Memorial Hospital (CMRPG3M0131~2 and CMRPG3L0151~3) and the Ministry of Science and Technology, Taiwan (MOST 109-2314-B-182A-019-MY3).

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Contributions

PYW was responsible for data analysis, interpretation of results, and draft manuscript preparation. HCC contributed to conceptualization, methodology, interpretation of results, and draft manuscript preparation. YJH contributed to conceptualization and methodology. KJC, NKW, LL, YPC, YSH, and CCL contributed to data collection and interpretation of results. WCW contributed to conceptualization, methodology, and supervision and review of the manuscript. All authors reviewed the results and approved the final version of the manuscript.

Corresponding author

Correspondence to Wei-Chi Wu.

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Wu, PY., Chen, HC., Hsueh, YJ. et al. Corneal topography in preterm children aged 2 years to 12 years with or without retinopathy of prematurity. Eye 37, 2565–2572 (2023). https://doi.org/10.1038/s41433-022-02375-x

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