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Evaluation of angle-to-angle and spur-to-spur using swept source optical coherence tomography in different refractive error

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  • Jeong Seop Yun
  • Ji Sang Min
  • Kook Young Kim

Abstract

Purpose: To measure angle-to-angle (ATA) and spur-to-spur (STS) distances along six meridians using swept-source optical coherence tomography (SS-OCT) and compare with horizontal white-to-white (WTW) distance in different refractive error. Methods: Overall, 126 eyes were assessed with the Anterion SS-OCT (Heidelberg Engineering, Heidelberg, Germany). ATA and STS distances were obtained using SS-OCT at 0, 30, 60, 90, 120, and 150 degrees. WTW was measured at 0 degree with built-in infrared camera. One way ANOVA test, pearson correlation coefficient, and stepwise multivariate regression analysis were used to compare ATA and STS distances with age, anterior chamber depth (ACD), axial length (AL), and simulated keratometric values (Sim K) in different refractive error groups. Results: The mean MRSE refraction was +0.05 ± 0.23 D in the emmetropic group (41 eyes), -3.42 ± 3.04 D in the myopic group (44 eyes), and +1.33 ± 0.64 D in the hyperopic group (31 eyes). There was no statistical difference in the WTW of the emmetropic (11.62 ± 0.44 mm), myopic (11.79 ± 0.46 mm), and hyperopic groups (11.80 ± 0.49 mm) using one-way ANOVA (p = 0.007). ATA and STS were vertically oval in all groups. The correlation between ATA, STS and age, ACD, AL, and K values showed different significance for each meridian according to the refractive error. ATA increased as the horizontal WTW, ACD, and AL increased and Sim K decreased. STS shows relatively smaller explanatory power than ATA in the stepwise multivariate regression analysis. Conclusions: This study is the first to analyze the relationship between ATA and STS compared to WTW by different refractive error. The difference between the horizontally oval WTW and vertically oval anterior chamber can be large, especially in myopia. ATA showed a greater positive correlation than STS with AL and ACD.

Suggested Citation

  • Jeong Seop Yun & Ji Sang Min & Kook Young Kim, 2022. "Evaluation of angle-to-angle and spur-to-spur using swept source optical coherence tomography in different refractive error," PLOS ONE, Public Library of Science, vol. 17(11), pages 1-17, November.
    • Handle: RePEc:plo:pone00:0277703
    DOI: 10.1371/journal.pone.0277703
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    References listed on IDEAS

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    1. Teerajet Taechameekietichai & Anwell Nguyen & Sunee Chansangpetch & Shan C Lin, 2021. "Displacement between anterior chamber width obtained by swept-source anterior segment optical coherence tomography and white-to-white distance," PLOS ONE, Public Library of Science, vol. 16(5), pages 1-13, May.
    2. Kook Young Kim & Gon Soo Choi & Min Seok Kang & Ungsoo Samuel Kim, 2020. "Comparison study of the axial length measured using the new swept-source optical coherence tomography ANTERION and the partial coherence interferometry IOL Master," PLOS ONE, Public Library of Science, vol. 15(12), pages 1-11, December.
    3. Xiaobin Xie & Giulia Corradetti & Abe Song & Anmol Pardeshi & William Sultan & Jong Yeon Lee & Fei Yu & Lixia Zhang & Shuang Chen & Vikas Chopra & Srinivas R Sadda & Benjamin Xu & Alex S Huang, 2020. "Age- and refraction-related changes in anterior segment anatomical structures measured by swept-source anterior segment OCT," PLOS ONE, Public Library of Science, vol. 15(10), pages 1-18, October.
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